enable coveralls
fix NPE in genMessage of FailedShardsException

shardFailure can be null
update es/upstream for memory consumption improvement
fix could not initialize Lucene QueryUtils bug when running integrationtests
fixup! fix could not initialize Lucene QueryUtils bug when running integrationtests
split up TransportSQLActionTest
fixup! split up TransportSQLActionTest
fixup! fixup! fix could not initialize Lucene QueryUtils bug when running integrationtests