Delete the associated reverse flow while deleting a short flow, as reverse
flow and forward flow should always co-exist, unless created due to Audit.
Interface code refactoring for interface. (One more commit pending)
- Split header files
- Split code for vm-interface to a new file
- Rename interface class
Patch in:

commit a9e6a9a7c028f328d201b1e68a309e7258c0f3d2
Author: Megh Bhatt <meghb@juniper.net>
Date:   Fri Nov 22 01:11:33 2013 -0800

    1. Remove code that looks at column name to determine the data type
       stored in cassandra in query engine.
    2. Install contrail-nodemgr in the control, config, analytics,
       and vrouter venv from the respective rpms instead of from
       the supervisor rpm to support upgrade of individual
       rpms
Merge remote-tracking branch 'upstream/master'
Fix for acl flow introspec yield logic.
Audit should create a short flow entry only if it fails to find flow entry in flow table.
flow entry should be removed from the flow entry map only when the
last reference goes away.

Fixes Issue:
------------
    if we end up triggering delete for a reverse flow entry which
    is waiting to receive an index from netlink ack, will fail to update
    the entry due to failure in flow entry map lookup.
Logic to stop sending netlink messages to vrouter after crossing
threshold of 200 messages, and resume when ack is received from vrouter.

This is done to avoid have netlink socket buffer overflow issues.
Update to the script to take admin as default user
Merge remote-tracking branch 'upstream/master'
Taking care of review comments
Merge pull request #36 from praveenkv/master

Interface code refactoring for interface. (More changes pending)
Merge pull request #31 from ashoksr/master

Pick active flow count from flow tree size
Test case for graph+filter
Merge pull request #37 from Juniper/tkarwa_script

Test case for graph+filter
Merge pull request #34 from Juniper/meghb_missedcommits

Patch in:
Schema changes for interface static routes
Merge pull request #38 from Juniper/rrugge-static-route

Schema changes for interface static routes
Merge pull request #21 from Prabhjot-Sethi/master

Delete the associated reverse flow while deleting a short flow
Fix unit test failures caused by recent flow changes