Do not forward coordinating put requests as this leads to siblings

Instead, coordinate locally, and update the request to strip out
the coord option, and use the frontier riak_object.

Requires the riak_core change on the same branch name.
Work around buildbot braindamage
Fix eunit test hang/brokenness since at least 1.4.6
Merge pull request #1047 from basho/bug/rdb/kv-gh1046

Do not forward coordinating put requests as this leads to siblings

Reviewed-by: slfritchie