Merge pull request #398 from achanda/master

Enable taking rabbit creds from a config file(cherry picked from commit b3505c16b4bb5ca3381eae4ccc7a0766ee4fe2bd)
Merge pull request #402 from Juniper/praneet_rabbit

Change rabbit default user and password to guest(cherry picked from commit f16bb97dc652e5873e5ebd01e330c23970835060)
Merge pull request #403 from Juniper/praneet_rabb

Fix minor python indentation(cherry picked from commit efc8f96f0239bd3e64fb1feaecdba17a6a1d058e)