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/defaults/salt/init.yml b/defaults/salt/init.yml
new file mode 100644
index 0000000..9ec550e
--- /dev/null
+++ b/defaults/salt/init.yml
@@ -0,0 +1,45 @@
+parameters:
+  _param:
+    salt_control_size_image_layout_default:
+      root:
+        size: '30%VG'
+      home:
+        size: '1G'
+      var_log:
+        size: '11%VG'
+      var_log_audit:
+        size: '5G'
+      var_tmp:
+        size: '11%VG'
+      tmp:
+        size: '5G'
+    salt_control_size_image_layout_ceph_mon: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_ceph_rgw: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_cicd_control: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_infra_idm: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_infra_integration: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_infra_maas: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_infra_proxy: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_infra_rsyslog: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_infra_storage: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_infra_version_control: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_kubernetes_control: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_kubernetes_proxy: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_opencontrail_analytics: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_opencontrail_control: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_barbican: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_baremetal: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_billing: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_control: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_database: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_dns: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_gateway: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_manila: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_message_queue: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_proxy: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_share: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_telemetry: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_openstack_upgrade: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_stacklight_log: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_stacklight_server: ${_param:salt_control_size_image_layout_default}
+    salt_control_size_image_layout_stacklight_telemetry: ${_param:salt_control_size_image_layout_default}