Prepare for LVM based VCP

This patch adds metadata needed to setup partitions on
VCP with LVM.

The new param 'image_layout' is added to salt:control:size:<size_name>
This is metadata that describes partition layout of VCP.

For now VCP has predefined list of partitions see
https://gerrit.mcp.mirantis.com/#/c/30862/

image_layout defines sizes for each of partitions that should be
applied after VCP is provisioned. The resizing will be done by
growlvmp.py script placed on VCP
https://gerrit.mcp.mirantis.com/#/c/31052/

The default layout:

  image_layout:
    root:
      size: '30%VG'     # 30% of VG total size
    home:
      size: '1G'        # fixed size 1G
    var_log:
      size: '11%VG'     # 11% of VG total size
    var_log_audit:
      size: '5G'        # fixed size 5G
    var_tmp:
      size: '11%VG'     # 11% of VG total size
    tmp:
      size: '5G'        # fixed size 5G

Related-Prod: PROD-24537

Change-Id: I18205dfa8478be2ae092a87ced833c8ab0cc01ea
diff --git a/salt/control/placement/opencontrail/small.yml b/salt/control/placement/opencontrail/small.yml
index 684ffa6..ad73241 100644
--- a/salt/control/placement/opencontrail/small.yml
+++ b/salt/control/placement/opencontrail/small.yml
@@ -11,6 +11,20 @@
     opencontrail_analytics_node03_hostname: nal03
     opencontrail_control_backend_image: ${_param:salt_control_xenial_image_backend}
     opencontrail_analytics_backend_image: ${_param:salt_control_xenial_image_backend}
+    salt_control_cluster_node_cloud_init_opencontrail_analytics:
+      user_data:
+        write_files:
+        - content: |
+            ${salt:control:size:opencontrail.analytics:image_layout}
+          owner: root:root
+          path: /usr/share/growlvm/image-layout.yml
+    salt_control_cluster_node_cloud_init_opencontrail_control:
+      user_data:
+       write_files:
+        - content: |
+            ${salt:control:size:opencontrail.control:image_layout}
+          owner: root:root
+          path: /usr/share/growlvm/image-layout.yml
   salt:
     control:
       cluster:
@@ -22,33 +36,39 @@
               backend: ${_param:opencontrail_control_backend_image}
               provider: ${_param:infra_kvm_node01_hostname}.${_param:cluster_domain}
               size: opencontrail.control
+              cloud_init: ${_param:salt_control_cluster_node_cloud_init_opencontrail_control}
             ntw02:
               name: ${_param:opencontrail_control_node02_hostname}
               image: ${_param:salt_control_xenial_image}
               backend: ${_param:opencontrail_control_backend_image}
               provider: ${_param:infra_kvm_node02_hostname}.${_param:cluster_domain}
               size: opencontrail.control
+              cloud_init: ${_param:salt_control_cluster_node_cloud_init_opencontrail_control}
             ntw03:
               name: ${_param:opencontrail_control_node03_hostname}
               image: ${_param:salt_control_xenial_image}
               backend: ${_param:opencontrail_control_backend_image}
               provider: ${_param:infra_kvm_node03_hostname}.${_param:cluster_domain}
               size: opencontrail.control
+              cloud_init: ${_param:salt_control_cluster_node_cloud_init_opencontrail_control}
             nal01:
               name: ${_param:opencontrail_analytics_node01_hostname}
               image: ${_param:salt_control_xenial_image}
               backend: ${_param:opencontrail_analytics_backend_image}
               provider: ${_param:infra_kvm_node01_hostname}.${_param:cluster_domain}
               size: opencontrail.analytics
+              cloud_init: ${_param:salt_control_cluster_node_cloud_init_opencontrail_analytics}
             nal02:
               name: ${_param:opencontrail_analytics_node02_hostname}
               image: ${_param:salt_control_xenial_image}
               backend: ${_param:opencontrail_analytics_backend_image}
               provider: ${_param:infra_kvm_node02_hostname}.${_param:cluster_domain}
               size: opencontrail.analytics
+              cloud_init: ${_param:salt_control_cluster_node_cloud_init_opencontrail_analytics}
             nal03:
               name: ${_param:opencontrail_analytics_node03_hostname}
               image: ${_param:salt_control_xenial_image}
               backend: ${_param:opencontrail_analytics_backend_image}
               provider: ${_param:infra_kvm_node03_hostname}.${_param:cluster_domain}
               size: opencontrail.analytics
+              cloud_init: ${_param:salt_control_cluster_node_cloud_init_opencontrail_analytics}