Verify "get a server" API response attributes

Now most attributes of Nova v2/v3 APIs are not checked in Tempest,
and this patch adds some tests which check these attributes to block
the backward incompatibility change in the future.

This patch adds the checks of "get a server" API responses.

The response body of v2 API is the following:
  {
    "server": {
      "id": "c2f2ebe8-5a25-442b-83d2-9f0926a7a88a",
      "name": "vm01-v3",
      "status": "ACTIVE",
      "image": {
        "id": "b62655db-2ff7-4d7f-8821-d0a468a25bec",
        "links": [{"href": "http://[..]", "rel": "bookmark"}]
      },
      "flavor": {
        "id": "42",
        "links": [{"href": "http://[..]", "rel": "bookmark"}]
      },
      "user_id": "832ebd066fb0427ea77c4aab6bab5ec1",
      "tenant_id": "b8d8f3df596b482e93c4225b1d72d2c2",
      "created": "2014-03-13T00:40:21Z",
      "updated": "2014-03-13T00:40:31Z",
      "metadata": {},
      "links": [
        {"href": "http://[..]", "rel": "self"},
        {"href": "http://[..]", "rel": "bookmark"}
      ],
      "addresses": {
        "private": [{
          "OS-EXT-IPS-MAC:mac_addr": "fa:16:3e:5f:c3:0f",
          "version": 4, "addr": "10.0.0.5", "OS-EXT-IPS:type": "fixed"
        }]
      },
      "key_name": null,
      "hostId": "6efdef81d6341b7fac789263e366cdf3ed5136f5894db8a2b79d1bc7",
      "progress": 0,
      "OS-SRV-USG:launched_at": "2014-03-13T00:40:31.000000",
      "OS-SRV-USG:terminated_at": null,
      "OS-EXT-AZ:availability_zone": "nova",

      "OS-EXT-STS:task_state": null,
      "OS-EXT-STS:vm_state": "active",
      "OS-EXT-STS:power_state": 1,

      "OS-EXT-SRV-ATTR:host": "localhost-dev",
      "OS-EXT-SRV-ATTR:instance_name": "instance-0000004a",
      "OS-EXT-SRV-ATTR:hypervisor_hostname": "localhost-dev",

      "os-extended-volumes:volumes_attached": [],
      "accessIPv4": "",
      "accessIPv6": "",
      "config_drive": "",
      "OS-DCF:diskConfig": "MANUAL"
    }
  }

The one of v3 API is the following:
  {
    "server": {
      "id": "c2f2ebe8-5a25-442b-83d2-9f0926a7a88a",
      "name": "vm01-v3",
      "status": "ACTIVE",
      "image": {
        "id": "b62655db-2ff7-4d7f-8821-d0a468a25bec",
        "links": [{"href": "http://[..]", "rel": "bookmark"}]
      },
      "flavor": {
        "id": "42", "links": [{"href": "http://192.168.11.100:8774/flavors/42", "rel": "bookmark"}]
      },
      "user_id": "832ebd066fb0427ea77c4aab6bab5ec1",
      "tenant_id": "b8d8f3df596b482e93c4225b1d72d2c2",
      "created": "2014-03-13T00:40:21Z",
      "updated": "2014-03-13T00:40:31Z",
      "metadata": {},
      "links": [
        {"href": "http://[..]", "rel": "self"},
        {"href": "http://[..]", "rel": "bookmark"}
      ],
      "addresses": {
        "private": [{
          "version": 4, "type": "fixed",
          "addr": "10.0.0.5", "mac_addr": "fa:16:3e:5f:c3:0f"
        }]
      },
      "key_name": null,
      "host_id": "6efdef81d6341b7fac789263e366cdf3ed5136f5894db8a2b79d1bc7",
      "progress": 0,
      "os-server-usage:launched_at": "2014-03-13T00:40:31.000000",
      "os-server-usage:terminated_at": null,
      "os-extended-availability-zone:availability_zone": "nova",

      "os-extended-status:task_state": null,
      "os-extended-status:vm_state": "active",
      "os-extended-status:power_state": 1,
      "os-extended-status:locked_by": null,

      "os-extended-server-attributes:host": "localhost-dev",
      "os-extended-server-attributes:instance_name": "instance-0000004a",
      "os-extended-server-attributes:hypervisor_hostname": "localhost-dev",

      "os-extended-volumes:volumes_attached": [],
      "os-pci:pci_devices": [],
      "os-access-ips:access_ip_v4": "",
      "os-access-ips:access_ip_v6": "",
      "os-config-drive:config_drive": ""
    }
  }

Partially implements blueprint nova-api-attribute-test

Change-Id: I951eae22d694349ae734e1ea16f24f500af6a894
diff --git a/tempest/api_schema/compute/v2/servers.py b/tempest/api_schema/compute/v2/servers.py
index fe53abd..6ee6f19 100644
--- a/tempest/api_schema/compute/v2/servers.py
+++ b/tempest/api_schema/compute/v2/servers.py
@@ -46,7 +46,7 @@
     }
 }
 
-update_server = copy.deepcopy(servers.base_update_server)
+update_server = copy.deepcopy(servers.base_update_get_server)
 update_server['response_body']['properties']['server']['properties'].update({
     'hostId': {'type': 'string'},
     'OS-DCF:diskConfig': {'type': 'string'},
@@ -60,6 +60,39 @@
     'hostId'
 )
 
+get_server = copy.deepcopy(servers.base_update_get_server)
+get_server['response_body']['properties']['server']['properties'].update({
+    'key_name': {'type': ['string', 'null']},
+    'hostId': {'type': 'string'},
+
+    # NOTE: Non-admin users also can see "OS-SRV-USG" and "OS-EXT-AZ"
+    # attributes.
+    'OS-SRV-USG:launched_at': {'type': ['string', 'null']},
+    'OS-SRV-USG:terminated_at': {'type': ['string', 'null']},
+    'OS-EXT-AZ:availability_zone': {'type': 'string'},
+
+    # NOTE: Admin users only can see "OS-EXT-STS" and "OS-EXT-SRV-ATTR"
+    # attributes.
+    'OS-EXT-STS:task_state': {'type': ['string', 'null']},
+    'OS-EXT-STS:vm_state': {'type': 'string'},
+    'OS-EXT-STS:power_state': {'type': 'integer'},
+    'OS-EXT-SRV-ATTR:host': {'type': ['string', 'null']},
+    'OS-EXT-SRV-ATTR:instance_name': {'type': 'string'},
+    'OS-EXT-SRV-ATTR:hypervisor_hostname': {'type': ['string', 'null']},
+    'os-extended-volumes:volumes_attached': {'type': 'array'},
+    'OS-DCF:diskConfig': {'type': 'string'},
+    'accessIPv4': parameter_types.access_ip_v4,
+    'accessIPv6': parameter_types.access_ip_v6,
+    'config_drive': {'type': 'string'}
+})
+get_server['response_body']['properties']['server']['required'].append(
+    # NOTE: OS-SRV-USG, OS-EXT-AZ, OS-EXT-STS, OS-EXT-SRV-ATTR,
+    # os-extended-volumes, OS-DCF and accessIPv4/v6 are API
+    # extension, and some environments return a response without
+    # these attributes. So they are not 'required'.
+    'hostId'
+)
+
 list_virtual_interfaces = {
     'status_code': [200],
     'response_body': {