Interface code refactoring for interface. (One more commit pending)
- Split header files
- Split code for vm-interface to a new file
- Rename interface class
Pick active flow count from flow tree size instead of incrementing/decrementing flow count during flow add/delete.
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 branch 'upstream/master'
Change to fix the issue:
When flow stats overflow bits are set, aging was not happening because of wrong comparison
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
Static route changes in service monitor.
Changes for ECMP handling of static routes.
Fix for instance IP allocation in API server
PEP8 fixes.
Merge pull request #42 from Juniper/rrugge-static-route

Static route changes in service monitor.
There changes are to enable analytics systemless tests. The src/opserver/test SConscript file is cleaned up as per the new directory structure. Some missing __init__.py files are added. This change must *NOT* be merged in without commit ae44763d64624440ab5c48a34c13b77e4b9dcff2 of contrail-build
Merge pull request #43 from Juniper/analytics_systest_ctrl

There changes are to enable analytics systemless tests. The src/opserver...
fixing gdb maro to take variable instead of calling function.