Add missing document start "---" to yaml files

Change-Id: I366c2124a778c5b0b22a8fe369d603adad75ebbe

ansible/roles/heat/templates/_deprecated.yaml

@@ -1,3 +1,4 @@
+---
 resource_registry:
     "OS::Heat::HARestarter":
     "OS::Heat::SoftwareDeployments":

contrib/demos/heat/steak-rg.yaml

@@ -1,3 +1,4 @@
+---
 heat_template_version: 2013-05-23
 
 parameters:

contrib/demos/heat/steak.yaml

@@ -1,3 +1,4 @@
+---
 heat_template_version: 2013-05-23
 
 parameters:

contrib/demos/magnum/redis-kube/redis-controller.yaml

@@ -1,3 +1,4 @@
+---
 apiVersion: v1beta3
 kind: ReplicationController
 metadata:
@@ -25,4 +26,3 @@ spec:
       volumes:
         - name: data
           emptyDir: {}
-

contrib/demos/magnum/redis-kube/redis-master.yaml

@@ -1,3 +1,4 @@
+---
 apiVersion: v1beta3
 kind: Pod
 metadata:

contrib/demos/magnum/redis-kube/redis-proxy.yaml

@@ -1,3 +1,4 @@
+---
 apiVersion: v1beta3
 kind: Pod
 metadata:

contrib/demos/magnum/redis-kube/redis-sentinel-controller.yaml

@@ -1,3 +1,4 @@
+---
 apiVersion: v1beta3
 kind: ReplicationController
 metadata:

contrib/demos/magnum/redis-kube/redis-sentinel-service.yaml

@@ -1,3 +1,4 @@
+---
 apiVersion: v1beta3
 kind: Service
 metadata:

releasenotes/notes/congress-broken-cbf8ca59d90a85cb.yaml

@@ -1,3 +1,4 @@
+---
 other:
   - Congress doesn't work correctly out of the box and will
     not deploy.  See Bug #1634641.