Review Board 1.7.22

HIVE-2086. Data loss with external table

Review Request #604 - Created April 15, 2011 and updated

Jonathan Natkins
Review request for HIVE-2086.  The external parameters were being set, but then being zeroed out by a call to params.clear(), resulting in an external table that wasn't marked as external.
Automated tests added
Review request changed
Updated (July 19, 2011, 4:50 p.m.)
The bug was fixed as a part of HIVE-1218, and this diff adds some regression tests for this particular issue.