Optimizations to improve flow setup rate
- Fetch UTCtimestamp only at the beigning of flow_handler proto process
  i.e., max upto 32 entries can have same setup time.
- get ksync nexthop from DB state instead of lookup
- Synchronous KSync-Vrouter operations, to remove limitation of 200
  outstanding message (for faster processing.)
Need to consider multiple response to one request.
Fix Source column bug in StatTable where query
Taking care of review comments.
    - added a knob in KSyncSock to run as Sync or Async
    - reverted changes for UTCtimestamp, will take it up later.
For link local service request, do src port nat. Bind to a local port, and use it as nat src port.
Update test case
Merge remote branch 'upstream/master'
Make BitSet::ToString() efficient - memory is allocated once.
install targets
Unit test cases for UVE Bandwidth usage of physical interface
Update for code review
Merge remote branch 'upstream/master'

Conflicts:
	src/vnsw/agent/pkt/flow_table.h
	src/vnsw/agent/pkt/test/test_pkt_flow.cc
added --logging_level arg to set python logging level.  Added log.INFO messages when connecting to redis, ifmap, cassandra, and zookeeper
Merge branch 'master' into ashoksr_ut
Expand the prefix to ip address. e.g. 8/8 becomes 8.0.0.0/8
Merge remote branch 'upstream/master'
* Increase vrf delete timeout to 15 minutes
Merge pull request #310 from noelbk/master

Added logging to api server when connecting to redis, cassandra, ifmap, and zookeeper
Merge pull request #316 from Juniper/subnet

Expand the prefix to ip address. e.g. 8/8 becomes 8.0.0.0/8
Merge pull request #317 from divakardhar/master

Increasing the Cfg stale timeout from 2 minutes to 15 minutes