[Tooling update] health_checks

* Added:
- contrail process list
- extended contrail_check to check nodetool status
- extended contrail_check to check processes uptime

* Code shugar fix: sorting import modules

Prod-Related: PROD-31970

Change-Id: I878f2307ce13800eec1558579b20fcefa49e2b25
diff --git a/README.rst b/README.rst
index 84c1cf9..bad75e7 100644
--- a/README.rst
+++ b/README.rst
@@ -932,6 +932,13 @@
 
   salt -C s-ntw03* health_checks.contrail_control_peer_status
 
+Fetch contrail nodes contrail processes uptime:
+
+.. code-block:: bash
+
+  salt -C 'I@opencontrail:compute' health_checks.contrail_process_list debug=True
+  salt -C 'I@opencontrail:control' health_checks.contrail_process_list role=controller debug=True
+
 Fetch libvirt supported machine types for compute node
 
 .. code-block:: bash