enhance logging for depend tracking mode

Add some extra log, to make the console output more understandable

Change-Id: If80cb9dba1031ad268bf9b6266ca83f93071a2ad
Fix neutron log format with colorization

Closes-Bug: #1254817

Change-Id: I6de17ef15c18e2f8ab246934461a2b7c6ae4f95f
Merge "enhance logging for depend tracking mode"
Merge "Fix neutron log format with colorization"
Merge branch 'master' of git://github.com/openstack-dev/devstack into opendaylight