[mitaka,newton,ocata] Use shared-salt for install_docker_on_gtw

Change-Id: I5f8e7d09d8503a9ad11182eac95b4600bcedef39
diff --git a/tcp_tests/templates/cookied-mcp-newton-dvr/openstack.yaml b/tcp_tests/templates/cookied-mcp-newton-dvr/openstack.yaml
index e298fcf..7260beb 100644
--- a/tcp_tests/templates/cookied-mcp-newton-dvr/openstack.yaml
+++ b/tcp_tests/templates/cookied-mcp-newton-dvr/openstack.yaml
@@ -9,6 +9,7 @@
 {% set OVERRIDE_POLICY = os_env('OVERRIDE_POLICY', '') %}
 
 {% import 'shared-openstack.yaml' as SHARED_OPENSTACK with context %}
+{% import 'shared-salt.yaml' as SHARED with context %}
 
 # Install OpenStack control services
 
@@ -172,17 +173,7 @@
   retry: {count: 1, delay: 30}
   skip_fail: false
 
-- description: Install docker.io on gtw
-  cmd: salt-call cmd.run 'apt-get install docker.io -y'
-  node_name: {{ HOSTNAME_GTW01 }}
-  retry: {count: 1, delay: 30}
-  skip_fail: false
-
-- description: Enable forward policy
-  cmd: iptables --policy FORWARD ACCEPT
-  node_name: {{ HOSTNAME_GTW01 }}
-  retry: {count: 1, delay: 30}
-  skip_fail: false
+{{ SHARED.INSTALL_DOCKER_ON_GTW() }}
 
 - description: create rc file on cfg
   cmd: scp ctl01:/root/keystonercv3 /root