Fix Docker 1.10 problems with empty tags and trailing :

Docker 1.10 is no longer tolerant of commands like "docker pull
myimage:" when we do not have an image tag in play.

Adjust all occurrences with one that only includes the : if a version is
defined.

Adjust the containerized CLI wrappers for a similar problem.

roles/openshift_cli/tasks/main.yml

@@ -5,7 +5,7 @@
 
 - name: Pull CLI Image
   command: >
-    docker pull {{ openshift.common.cli_image }}:{{ openshift_version }}
+    docker pull {{ openshift.common.cli_image }}{{ ':' + openshift_version if openshift_version is defined and openshift_version != '' else '' }}
   when: openshift.common.is_containerized | bool
 
 - name: Create /usr/local/bin/openshift cli wrapper

roles/openshift_cli/templates/openshift.j2

@@ -5,14 +5,14 @@ fi
 cmd=`basename $0`
 user=`id -u`
 group=`id -g`
-image_tag={{ openshift_version }}
+image_tag="{{ openshift_version }}"
 
 >&2 echo """
 ================================================================================
 ATTENTION: You are running ${cmd} via a wrapper around 'docker run {{ openshift.common.cli_image }}:${image_tag}'.
 This wrapper is intended only to be used to bootstrap an environment. Please
 install client tools on another host once you have granted cluster-admin
-privileges to a user. 
+privileges to a user.
 {% if openshift.common.deployment_type in ['openshift-enterprise','atomic-enterprise'] %}
 See https://docs.openshift.com/enterprise/latest/cli_reference/get_started_cli.html
 {% else %}
@@ -21,4 +21,8 @@ See https://docs.openshift.org/latest/cli_reference/get_started_cli.html
 =================================================================================
 """
 
-docker run -i --privileged --net=host --user=${user}:${group} -v ~/.kube:/root/.kube -v /tmp:/tmp -v {{ openshift.common.config_base}}:{{ openshift.common.config_base }} -e KUBECONFIG=/root/.kube/config --entrypoint ${cmd} --rm {{ openshift.common.cli_image }}:${image_tag} "${@}"
+if [ -n "$image_tag" ]; then
+    image_tag=":$image_tag"
+fi
+
+docker run -i --privileged --net=host --user=${user}:${group} -v ~/.kube:/root/.kube -v /tmp:/tmp -v {{ openshift.common.config_base}}:{{ openshift.common.config_base }} -e KUBECONFIG=/root/.kube/config --entrypoint ${cmd} --rm {{ openshift.common.cli_image }}${image_tag} "${@}"

roles/openshift_master/tasks/main.yml

@@ -29,7 +29,7 @@
 
 - name: Pull master image
   command: >
-    docker pull {{ openshift.master.master_image }}:{{ openshift_version }}
+    docker pull {{ openshift.master.master_image }}{{ ':' + openshift_version if openshift_version is defined and openshift_version != '' else '' }}
   when: openshift.common.is_containerized | bool
 
 - name: Create openshift.common.data_dir

roles/openshift_node/tasks/main.yml

@@ -39,12 +39,12 @@
 
 - name: Pull node image
   command: >
-    docker pull {{ openshift.node.node_image }}:{{ openshift_version }}
+    docker pull {{ openshift.node.node_image }}{{ ':' + openshift_version if openshift_version is defined and openshift_version != '' else '' }}
   when: openshift.common.is_containerized | bool
 
 - name: Pull OpenVSwitch image
   command: >
-    docker pull {{ openshift.node.ovs_image }}:{{ openshift_version }}
+    docker pull {{ openshift.node.ovs_image }}{{ ':' + openshift_version if openshift_version is defined and openshift_version != '' else '' }}
   when: openshift.common.is_containerized | bool and openshift.common.use_openshift_sdn | bool
 
 - name: Install the systemd units