move msearch to use atomic array instead of synchronize
Add missing PHRASE flag for simple_query_string

Closes #4911
[TEST] Improved IndexAliasesTests

more assertAcked, removed TODO and needless sleep
Improved CreateIndexRequest and CreateIndexRequestBuilder javadocs
[TEST] Added REST tests for create index api
[TEST] Adapted REST tests for create index api to 0.90 branch
[DOCS] unified index settings info and added warmers section in create index docs