Add UUIDs to all tempest tests and gate check

Adds uuid4 as a decorator of the form:
@test.idempotent_id('12345678-1234-1234-1234-123456789abc')
to every test in the Tempest tree. Includes a gate check to
ensure the existence and uniqueness of the ids.

Modify check tool to ignore Tempest unit tests.

Change-Id: I19e3c7dd555a3ea09d585fb9091c357a300e6559
Co-Authored-By: Sergey Slipushenko <sslypushenko@mirantis.com>
Implements: bp test-uuid
diff --git a/tempest/api/compute/admin/test_services_negative.py b/tempest/api/compute/admin/test_services_negative.py
index 39d0ee1..b8974ca 100644
--- a/tempest/api/compute/admin/test_services_negative.py
+++ b/tempest/api/compute/admin/test_services_negative.py
@@ -31,11 +31,13 @@
         cls.non_admin_client = cls.services_client
 
     @test.attr(type=['negative', 'gate'])
+    @test.idempotent_id('1126d1f8-266e-485f-a687-adc547492646')
     def test_list_services_with_non_admin_user(self):
         self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.list_services)
 
     @test.attr(type=['negative', 'gate'])
+    @test.idempotent_id('d0884a69-f693-4e79-a9af-232d15643bf7')
     def test_get_service_by_invalid_params(self):
         # return all services if send the request with invalid parameter
         services = self.client.list_services()
@@ -44,6 +46,7 @@
         self.assertEqual(len(services), len(services_xxx))
 
     @test.attr(type=['negative', 'gate'])
+    @test.idempotent_id('1e966d4a-226e-47c7-b601-0b18a27add54')
     def test_get_service_by_invalid_service_and_valid_host(self):
         services = self.client.list_services()
         host_name = services[0]['host']
@@ -52,6 +55,7 @@
         self.assertEqual(0, len(services))
 
     @test.attr(type=['negative', 'gate'])
+    @test.idempotent_id('64e7e7fb-69e8-4cb6-a71d-8d5eb0c98655')
     def test_get_service_with_valid_service_and_invalid_host(self):
         services = self.client.list_services()
         binary_name = services[0]['binary']