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/sizes/opencontrail.yml b/salt/control/sizes/opencontrail.yml
index 41b858d..bf4810e 100644
--- a/salt/control/sizes/opencontrail.yml
+++ b/salt/control/sizes/opencontrail.yml
@@ -16,8 +16,10 @@
           ram: ${_param:salt_control_size_ram_opencontrail_control}
           disk_profile: ${_param:salt_control_size_disk_profile_opencontrail_control}
           net_profile: ${_param:salt_control_size_net_profile_opencontrail_control}
+          image_layout: ${_param:salt_control_size_image_layout_opencontrail_control}
         opencontrail.analytics:
           cpu: ${_param:salt_control_size_cpu_opencontrail_analytics}
           ram: ${_param:salt_control_size_ram_opencontrail_analytics}
           disk_profile: ${_param:salt_control_size_disk_profile_opencontrail_analytics}
           net_profile: ${_param:salt_control_size_net_profile_opencontrail_analytics}
+          image_layout: ${_param:salt_control_size_image_layout_opencontrail_analytics}