Fix nodemgr failure in sanity run

To overcome problem with nodemgr failure reported by contrail-status
script, we need to change default expected disk storage space to
much lower values for sanity VMs.

Change-Id: Ic058b79b415c558a419da54a3511a993c7bf2f3e
Closes-Bug: #1783759
(cherry picked from commit b976238)

roles/contrail-helm-deployer/files/helm-deploy.sh

@@ -84,6 +84,8 @@ global:
     PHYSICAL_INTERFACE: $physical_intf
     VROUTER_GATEWAY:
     CONTROL_DATA_NET_LIST:
+    CONFIG_NODEMGR__DEFAULTS__minimum_diskGB: "5"
+    DATABASE_NODEMGR__DEFAULTS__minimum_diskGB: "5"
   contrail_env_vrouter_kernel:
     AGENT_MODE: kernel
 EOF