Add testing of the Thrift service implementation.
Merge remote-tracking branch 'upstream/master'
Add a test of bulk routing in the Thrift server.
add testing of FindNearestVertex.
actually, just put all logging on INFO except the retry messages
remove repeated trip ids, fixes #1063
comment
more logging changes
Merge remote-tracking branch 'upstream/master'
Multi-graph auto-discovery: handle root graph.

Always prevent loading twice the same graph in mixed configured and auto-discovery mode.