Change heat and mistral to use v3/ec2tokens url

They were using v2.0 and we're getting rid of v2.0/ec2tokens in the
EndpointMap.

Change-Id: Ib9fbbdb0144bb4e250c561613bba6219506ff30f

puppet/services/heat-engine.yaml

@@ -112,7 +112,11 @@ outputs:
                   - {get_param: [EndpointMap, MysqlInternal, host]}
                   - '/heat'
                   - '?read_default_file=/etc/my.cnf.d/tripleo.cnf&read_default_group=tripleo'
-            heat::keystone_ec2_uri: {get_param: [EndpointMap, KeystoneEC2, uri]}
+            heat::keystone_ec2_uri:
+              list_join:
+              - ''
+              - - {get_param: [EndpointMap, KeystoneV3Internal, uri]}
+                - '/ec2tokens'
             heat::keystone::domain::domain_password: {get_param: HeatStackDomainAdminPassword}
             heat::engine::auth_encryption_key:
               yaql:

puppet/services/mistral-base.yaml

@@ -74,7 +74,11 @@ outputs:
         mistral::keystone_password: {get_param: MistralPassword}
         mistral::keystone_tenant: 'service'
         mistral::auth_uri: {get_param: [EndpointMap, KeystoneInternal, uri]}
-        mistral::keystone_ec2_uri: {get_param: [EndpointMap, KeystoneEC2, uri]}
+        mistral::keystone_ec2_uri:
+          list_join:
+          - ''
+          - - {get_param: [EndpointMap, KeystoneV3Internal, uri]}
+            - '/ec2tokens'
         mistral::identity_uri: {get_param: [EndpointMap, KeystoneInternal, uri_no_suffix]}
       service_config_settings:
         keystone: