Disable autocreating database when start savanna

Change-Id: I14a0602bb34bf09086428766cb681345191436fe
Allow boolean "streaming" in Job JSON

Allow a boolean "streaming" to be set in the POST of a job object.
This flag will loosen validation for Job objects when the type is
MapReduce, so that "libs" is not required.  This is in preparation
for streaming MapReduce jobs.  It is expected that the UI will
set the "streaming" flag for MapReduce based on user input.

Implements: blueprint edp-oozie-streaming-mapreduce
Change-Id: I9f35e3de53e5c9c3234f9b20e7f051e146b5a5ad
Merge "Disable autocreating database when start savanna"
Merge "Allow boolean "streaming" in Job JSON"