Allow heat standalone to work devstack stack

For functional testing of heat-standalone it is desirable for
heat to orchestrate on the rest of the cloud which is brought up
by devstack. This change makes the following changes to enable
this when HEAT_STANDALONE=True:

- Don't register the orchestration endpoint or create any dedicated
  heat accounts
- Install and configure the heat keystone V2 auth plugin instead of
  the default v3
- set heat.conf [clients_heat] url so that heat can call its own
  API when no orchestration endpoint is registered
- Modify create_userrc.sh to set the required heat client env
  variables to work with the standalone heat

Change-Id: Idae33bf1a9d550e2575e6390d2d7c8d3b94c401d
diff --git a/tools/create_userrc.sh b/tools/create_userrc.sh
index 5b1111a..863fe03 100755
--- a/tools/create_userrc.sh
+++ b/tools/create_userrc.sh
@@ -37,6 +37,7 @@
 -C <tenant_name> create user and tenant, the specifid tenant will be the user's tenant
 -r <name> when combined with -C and the (-u) user exists it will be the user's tenant role in the (-C)tenant (default: Member)
 -p <userpass> password for the user
+--heat-url <heat_url>
 --os-username <username>
 --os-password <admin password>
 --os-tenant-name <tenant_name>
@@ -53,12 +54,13 @@
 EOF
 }
 
-if ! options=$(getopt -o hPAp:u:r:C: -l os-username:,os-password:,os-tenant-name:,os-tenant-id:,os-auth-url:,target-dir:,skip-tenant:,os-cacert:,help,debug -- "$@"); then
+if ! options=$(getopt -o hPAp:u:r:C: -l os-username:,os-password:,os-tenant-name:,os-tenant-id:,os-auth-url:,target-dir:,heat-url:,skip-tenant:,os-cacert:,help,debug -- "$@"); then
     display_help
     exit 1
 fi
 eval set -- $options
 ADDPASS=""
+HEAT_URL=""
 
 # The services users usually in the service tenant.
 # rc files for service users, is out of scope.
@@ -79,6 +81,7 @@
     --os-auth-url) export OS_AUTH_URL=$2; shift ;;
     --os-cacert) export OS_CACERT=$2; shift ;;
     --target-dir) ACCOUNT_DIR=$2; shift ;;
+    --heat-url) HEAT_URL=$2; shift ;;
     --debug) set -o xtrace ;;
     -u) MODE=${MODE:-one};  USER_NAME=$2; shift ;;
     -p) USER_PASS=$2; shift ;;
@@ -209,6 +212,10 @@
     if [ -n "$ADDPASS" ]; then
         echo "export OS_PASSWORD=\"$user_passwd\"" >>"$rcfile"
     fi
+    if [ -n "$HEAT_URL" ]; then
+        echo "export HEAT_URL=\"$HEAT_URL/$tenant_id\"" >>"$rcfile"
+        echo "export OS_NO_CLIENT_AUTH=True" >>"$rcfile"
+    fi
 }
 
 #admin users expected