Clean up some deprecation warnings

* "Using bare variables is deprecated. Update your playbooks so that
  the environment value uses the full variable syntax"
* Closes #2125

playbooks/common/openshift-node/config.yml

@@ -121,7 +121,7 @@
                                                     | union(groups['oo_etcd_to_config'] | default([])))
                                                 | oo_collect('openshift.common.hostname') | default([]) | join (',')
                                                 }}"
-    when: "{{ (openshift_http_proxy is defined or openshift_https_proxy is defined) and 
+    when: "{{ (openshift_http_proxy is defined or openshift_https_proxy is defined) and
             openshift_generate_no_proxy_hosts | default(True) | bool }}"
   roles:
   - openshift_node
@@ -137,7 +137,7 @@
                                                     | union(groups['oo_etcd_to_config'] | default([])))
                                                 | oo_collect('openshift.common.hostname') | default([]) | join (',')
                                                 }}"
-    when: "{{ (openshift_http_proxy is defined or openshift_https_proxy is defined) and 
+    when: "{{ (openshift_http_proxy is defined or openshift_https_proxy is defined) and
             openshift_generate_no_proxy_hosts | default(True) | bool }}"
   roles:
   - openshift_node
@@ -184,7 +184,7 @@
         -C {{ etcd_generated_certs_dir }}/{{ item.etcd_cert_subdir }} .
     args:
       creates: "{{ etcd_generated_certs_dir }}/{{ item.etcd_cert_subdir }}.tgz"
-    with_items: etcd_needing_client_certs | default([])
+    with_items: "{{ etcd_needing_client_certs | default([]) }}"
   - name: Retrieve the etcd cert tarballs
     fetch:
       src: "{{ etcd_generated_certs_dir }}/{{ item.etcd_cert_subdir }}.tgz"
@@ -192,7 +192,7 @@
       flat: yes
       fail_on_missing: yes
       validate_checksum: yes
-    with_items: etcd_needing_client_certs | default([])
+    with_items: "{{ etcd_needing_client_certs | default([]) }}"
 
 - name: Copy the external etcd flannel certs to the nodes
   hosts: oo_nodes_to_config

roles/etcd_certificates/tasks/client.yml

@@ -4,7 +4,7 @@
     path: "{{ etcd_generated_certs_dir }}/{{ item.etcd_cert_subdir }}"
     state: directory
     mode: 0700
-  with_items: etcd_needing_client_certs | default([])
+  with_items: "{{ etcd_needing_client_certs | default([]) }}"
 
 - name: Create the client csr
   command: >
@@ -19,7 +19,7 @@
                  ~ item.etcd_cert_prefix ~ 'client.csr' }}"
   environment:
     SAN: "IP:{{ item.etcd_ip }}"
-  with_items: etcd_needing_client_certs | default([])
+  with_items: "{{ etcd_needing_client_certs | default([]) }}"
 
 - name: Sign and create the client crt
   command: >
@@ -33,10 +33,10 @@
                  ~ item.etcd_cert_prefix ~ 'client.crt' }}"
   environment:
     SAN: "IP:{{ item.etcd_ip }}"
-  with_items: etcd_needing_client_certs | default([])
+  with_items: "{{ etcd_needing_client_certs | default([]) }}"
 
 - file:
     src: "{{ etcd_ca_cert }}"
     dest: "{{ etcd_generated_certs_dir}}/{{ item.etcd_cert_subdir }}/{{ item.etcd_cert_prefix }}ca.crt"
     state: hard
-  with_items: etcd_needing_client_certs | default([])
+  with_items: "{{ etcd_needing_client_certs | default([]) }}"

roles/etcd_certificates/tasks/server.yml

@@ -4,7 +4,7 @@
     path: "{{ etcd_generated_certs_dir }}/{{ item.etcd_cert_subdir }}"
     state: directory
     mode: 0700
-  with_items: etcd_needing_server_certs | default([])
+  with_items: "{{ etcd_needing_server_certs | default([]) }}"
 
 - name: Create the server csr
   command: >
@@ -19,7 +19,7 @@
                  ~ item.etcd_cert_prefix ~ 'server.csr' }}"
   environment:
     SAN: "IP:{{ item.etcd_ip }}"
-  with_items: etcd_needing_server_certs  | default([])
+  with_items: "{{ etcd_needing_server_certs  | default([]) }}"
 
 - name: Sign and create the server crt
   command: >
@@ -33,7 +33,7 @@
                  ~ item.etcd_cert_prefix ~ 'server.crt' }}"
   environment:
     SAN: "IP:{{ item.etcd_ip }}"
-  with_items: etcd_needing_server_certs  | default([])
+  with_items: "{{ etcd_needing_server_certs  | default([]) }}"
 
 - name: Create the peer csr
   command: >
@@ -48,7 +48,7 @@
                  ~ item.etcd_cert_prefix ~ 'peer.csr' }}"
   environment:
     SAN: "IP:{{ item.etcd_ip }}"
-  with_items: etcd_needing_server_certs | default([])
+  with_items: "{{ etcd_needing_server_certs | default([]) }}"
 
 - name: Sign and create the peer crt
   command: >
@@ -62,10 +62,10 @@
                  ~ item.etcd_cert_prefix ~ 'peer.crt' }}"
   environment:
     SAN: "IP:{{ item.etcd_ip }}"
-  with_items: etcd_needing_server_certs | default([])
+  with_items: "{{ etcd_needing_server_certs | default([]) }}"
 
 - file:
     src: "{{ etcd_ca_cert }}"
     dest: "{{ etcd_generated_certs_dir}}/{{ item.etcd_cert_subdir }}/{{ item.etcd_cert_prefix }}ca.crt"
     state: hard
-  with_items: etcd_needing_server_certs | default([])
+  with_items: "{{ etcd_needing_server_certs | default([]) }}"