various fixes for cluster_mapping

changed cluster mapping to correct nodes.

fixed logging

a few more fixes aimed at getting closer to passing

added test for issue 306, decommissioned cluster redirection

changes to support use of ring meta-data instead of ring for mapping config

changed to use riak_repl_console:block_provider_redirect/1 for configuration
added test for delete_block_requestor_redirect
fixed API to add redirect on LeaderC
reverted to master
Merge pull request #377 from basho/jra_issue_306-squashed

Test for Issue 306