Tweak log message and level for Router ID and AS change.
Merge pull request #205 from praveenkv/master

VGW bug fixes
Change to disable logging via environment variable
Merge pull request #200 from Juniper/nsheth_bgp_log

Tweak log message and level for Router ID and AS change.
Merge pull request #206 from Juniper/logchg

Change to disable logging via environment variable