Create index function allows creation of index with name "_dont_index_".

[asyncmind0]

Create index function allows creation of index with name _dont_index_ .

Once index with tombstone index name is created, solr inialization fails with

 2017-06-13 03:53:20.530 [info] <0.7.0> Application yokozuna exited with reason: {{shutdown,{failed_to_start_child,yz_general_sup,{shutdown,{failed_to_start_child,yz_solrq_sup,{start_spec,{duplicate_child_name,{<<"_dont_index_">>,91343852333
1814323877303020447676887284957839360}}}}}}},{yz_app,start,[normal,[]]}}
2017-06-13 03:53:20.532 [info] <0.369.0>@riak_kv_app:prep_stop:228 Stopping application riak_kv - marked service down.