Move to quay.io with kuryr/demo docker image.

Change documentation and tests from 'demo/kuryr' which by default will
use docker registry to 'quay.io/demo/kuryr' which will hint about
quay.io registry.

Change-Id: I7edc6bd8fed2943acf78ce2b66c44c91b1c33114
(cherry picked from commit 293750c9db)

doc/source/installation/network_namespace.rst

@@ -108,10 +108,10 @@ Testing the network per namespace functionality
 
 3. Create a pod in the created namespaces::
 
-    $ kubectl run -n test1 --image kuryr/demo demo
+    $ kubectl run -n test1 --image quay.io/kuryr/demo demo
     deployment "demo" created
 
-    $ kubectl run -n test2 --image kuryr/demo demo
+    $ kubectl run -n test2 --image quay.io/kuryr/demo demo
     deployment "demo" created
 
     $ kubectl -n test1 get pod -o wide

doc/source/installation/network_policy.rst

@@ -308,7 +308,7 @@ the label `project: default` as stated on the policy namespaceSelector.
         name: demo-pod
       spec:
         containers:
-        - image: kuryr/demo
+        - image: quay.io/kuryr/demo
           imagePullPolicy: Always
           name: demo-pod
 

kuryr_kubernetes/tests/unit/controller/drivers/test_network_policy_security_groups.py

@@ -239,7 +239,7 @@ class TestNetworkPolicySecurityGroupsDriver(test_base.TestCase):
                     'environment': 'production'}},
             'spec': {
                 'containers': [{
-                    'image': 'kuryr/demo',
+                    'image': 'quay.io/kuryr/demo',
                     'imagePullPolicy': 'Always',
                     'name': mock.sentinel.pod_name
                     }]
@@ -259,7 +259,7 @@ class TestNetworkPolicySecurityGroupsDriver(test_base.TestCase):
                     '"run": "demo","environment": "development"}'}},
             'spec': {
                 'containers': [{
-                    'image': 'kuryr/demo',
+                    'image': 'quay.io/kuryr/demo',
                     'imagePullPolicy': 'Always',
                     'name': mock.sentinel.pod_name
                     }]
@@ -273,7 +273,7 @@ class TestNetworkPolicySecurityGroupsDriver(test_base.TestCase):
                 'namespace': self._namespace},
             'spec': {
                 'containers': [{
-                    'image': 'kuryr/demo',
+                    'image': 'quay.io/kuryr/demo',
                     'imagePullPolicy': 'Always',
                     'name': mock.sentinel.pod_name
                     }]
@@ -296,7 +296,7 @@ class TestNetworkPolicySecurityGroupsDriver(test_base.TestCase):
                     'openstack.org/kuryr-pod-label': '{"tier": "backend"}'}},
             'spec': {
                 'containers': [{
-                    'image': 'kuryr/demo',
+                    'image': 'quay.io/kuryr/demo',
                     'imagePullPolicy': 'Always',
                     'name': mock.sentinel.pod_name
                     }]},