[ceph] Add ability to spawn osds with additional volumes

Related-Prod: PRODX-19091
Change-Id: I1a53a35906f0596be3d186182aca5f9301f88df8
diff --git a/de/heat-templates/fragments/SrvInstancesBMCephOSD.yaml b/de/heat-templates/fragments/SrvInstancesBMCephOSD.yaml
index ba089d2..42e7f47 100644
--- a/de/heat-templates/fragments/SrvInstancesBMCephOSD.yaml
+++ b/de/heat-templates/fragments/SrvInstancesBMCephOSD.yaml
@@ -91,6 +91,9 @@
     description: Comma separated list of IP of BGP neighbors
     default: ''
     type: string
+  num_volumes:
+    type: number
+    default: 0
 
 resources: