DRILL-327: - Use sqlline 1.1.6, and change the license file accordingly. Original patch by B Anil Kumar.
Make tests extend shared base class.  Add additional tracking in base class around memory usage per test.
DRILL-474: Long.MIN_VALUE is not parsed as BIGINT but as a Double
DRILL-452: Conversion functions for external data types
DRILL-514: improvements for unit tests on MapR profile
Fixes for DRILL-514, increase HashJoin timeout and cleanup PopUnitTestBase