Move control plane image to usage of mcp xenial

As a part of product we provide mcp uvuntu xenial image
for control plane, so we need to move on it usage for verification images
that we deliver as a part of MCP

Change-Id: I54e13805062e27064934e147777a6f0a649f3aa0
diff --git a/tcp_tests/templates/virtual-mcp-pike-dvr/underlay.yaml b/tcp_tests/templates/virtual-mcp-pike-dvr/underlay.yaml
index 670898b..3c678d2 100644
--- a/tcp_tests/templates/virtual-mcp-pike-dvr/underlay.yaml
+++ b/tcp_tests/templates/virtual-mcp-pike-dvr/underlay.yaml
@@ -170,6 +170,9 @@
          - name: cfg01_day01_image               # Pre-configured day01 image
            source_image: {{ os_env('IMAGE_PATH_CFG01_DAY01', os_env('IMAGE_PATH1604')) }} # http://images.mirantis.com/cfg01-day01.qcow2 or fallback to IMAGE_PATH1604
            format: qcow2
+         - name: mcp_ubuntu_1604_image           # Pre-configured image for control plane
+           source_image: !os_env MCP_IMAGE_PATH1604
+           format: qcow2
 
         nodes:
           - name: {{ HOSTNAME_CFG01 }}
@@ -222,7 +225,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: cinder
                   capacity: 50
@@ -263,7 +266,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: cinder
                   capacity: 50
@@ -292,7 +295,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: cinder
                   capacity: 50
@@ -321,7 +324,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: iso  # Volume with name 'iso' will be used
                              # for store image with cloud-init metadata.
@@ -347,7 +350,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: iso  # Volume with name 'iso' will be used
                              # for store image with cloud-init metadata.
@@ -373,7 +376,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: iso  # Volume with name 'iso' will be used
                              # for store image with cloud-init metadata.
@@ -399,7 +402,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: cinder
                   capacity: 50
@@ -532,7 +535,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: iso  # Volume with name 'iso' will be used
                              # for store image with cloud-init metadata.
@@ -558,7 +561,7 @@
               volumes:
                 - name: system
                   capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
+                  backing_store: mcp_ubuntu_1604_image
                   format: qcow2
                 - name: iso  # Volume with name 'iso' will be used
                              # for store image with cloud-init metadata.