ENG-5517: Add client affinity stats to the client.  Track the number
of writes and reads which the client believes that it routed according
to affinity vs. the number routed by round-robin choice.
ENG-5517: Add client affinity stats to the output of the voltkvqa sync
benchmark
Need to exclude this always-failing test from ant junit until we fix
the regression it tests.
ENG-5517:  Add client reconnect to SyncBenchmark
ENG-5517: Display periodic affinity stats
ENG-5517: Review feedback:
- Simplify dumb if ladders
- Provide a stats rollup convenience method
- Commentary
Merge remote-tracking branch 'origin/master' into eng5517

Conflicts:
	src/frontend/org/voltdb/client/Distributer.java
Merge pull request #1028 from VoltDB/eng5517

Eng5517, r=akhanzode