Simplify keystone into one instance.

keystone.yaml

@@ -30,8 +30,8 @@ Resources:
     Properties:
       UserName:
         Ref: ApiUser
-  KeystoneLaunch:
-    Type: AWS::AutoScaling::LaunchConfiguration
+  Keystone:
+    Type: AWS::EC2::Instance
     Properties:
       ImageId:
         {Ref: KeystoneImage}
@@ -53,9 +53,3 @@ Resources:
       admin-token: {Ref: AdminToken}
       keystone:
         db: {Ref: KeystoneDSN}
-  Keystone:
-    Type: OS::Heat::InstanceGroup
-    Properties:
-      LaunchConfigurationName: { Ref: KeystoneLaunch }
-      AvailabilityZones: [ 1 ]
-      Size: '1'