Make BitSet::ToString() efficient - memory is allocated once.
Fix find_last to only look at the last block.
Change the whitelist from vector to set for speedup.
Merge pull request #302 from Juniper/nsheth_bitset

Make BitSet::ToString() efficient - memory is allocated once.
Making the visitor a const for the other calls to Visit()
Merge pull request #355 from Juniper/cb02

Change the whitelist from vector to set for speedup.
fix vizd crash because of invalid access
Merge pull request #357 from Juniper/rajreddy_ut2

fix vizd crash because of invalid access
Enable ClearComputeNodeConnection,ClearBgpNeighborReq under --test-mode while launching control-node
Merge pull request #359 from Juniper/clear_commands

Enable ClearComputeNodeConnection,ClearBgpNeighborReq under --test-mode ...
Commit after merge