GEOMESA-151 allowing schema to not be set in datastore config for already created features
GEOMESA-155 fix for non-thread-safe map

Changed attributeNameLookUp into a HashMap with SynchronizedMap traits
GEOMESA-162 Turn off zookeeper.ClientCnxn DEBUG logging in REPL
GEOMESA-154 Remove commented out code present in MockAccumuloSource in IteratorTriggerTest
Merge branch 'accumulo1.5.x/1.x' of github.com:locationtech/geomesa into f_index_renaming
A few minor formatting changes.