This allows to specify split keys in Kudu's CREATE TABLE statement as part
of the key/value pairs in TBLPROPERTIES.
Splits are expected to be specified in as json arrays of arrays: [[key1], [key2], ...]
'key1', 'key2 might be single values or comma separated lists of values, depending
on whether the table has a simple of compound primary key.
This also adds a series of test tables to be created for the kutu table format
when load-data.py is executed.
Change-Id: I1824199fda14abb2d7352800789f2b9c2f2124ae
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/6974
Tested-by: jenkins
Reviewed-by: Martin Grund <mgrund@cloudera.com>