Feat nfs mount switch

We don't really need nfs mount on http-proxy, so adding a switch to turn it off when deploying http-proxy.

Closes #154 (closed)

ansible/group_vars/all

@@ -28,6 +28,7 @@
   ldap_uri: "ldap://ldapserver"
 
 # nfs_mounts related
+  enable_nfs_mounts: true
   use_autofs: false
   mount_points:
     - /gpfs4