Add two failing tests for index admin
Remove trailing whitespace
Return 204 on index PUT success
Add 409 index test
Add test to verify that index listing
Add delete, get, and 404 tests for index resource
Avoid race condition in index resource

* Use same ring for lifetime of request as ring could change
  mid-request (this could still be thwarted by calls which use the
  ring but don't take it as a parameter).

* For index to be considered existing it should exist both in the ring
  and in Solr.  This allows the 404 to kick in immediately after a
  delete rather than waiting seconds for Solr to cleanup.