This is the riak_kv related pull-request for the work predominately made in basho/riak_core#319
Reduce get_my_ring calls using chashbin/etc
Optimize coverage and riak_kv_mrc_pipe using chashbin
+1. Clearly takes advantage of the changes in basho/riak_core#319. Ran a few riak_tests in concjunction w/ the core review and all worked as expected
Merge #554 from jdb-large-master into staging-1.4
Fix eunit test failures in riak_kv_vnode that were not caught pre-merge.