[Tooling update] health_checks

* Added:
- compute vrouter namespaces list

* Fixed:
- OC4.x usecase for contrail-status and nodetool
- Disabled process list check for OC4.x vrouters.

Prod-Related: PROD-31970

Change-Id: I7e9409c366b0bbae61b05882b6315d03b28c6c86
diff --git a/README.rst b/README.rst
index bad75e7..9d41c97 100644
--- a/README.rst
+++ b/README.rst
@@ -718,11 +718,18 @@
   salt-call health_checks.ntp_check
   salt-call health_checks.ntp_check min_peers=2 max_stratum=2
 
+List vrouter namespaces on contrail computes:
+
+.. code-block:: bash
+
+  salt -C 'I@opencontrail:compute' health_checks.list_namespaces
+
 Verify contrail nodes contrail-status output:
 
 .. code-block:: bash
 
   salt-call health_checks.contrail_check debug=True
+  salt-call health_checks.contrail_check nodetool_expected_size=2 debug=True
 
 Verify galera cluster status: