Fix the logic in buildall that deals with create-load-data command line paramters.
Fix the logic in buildall that deals with create-load-data command line paramters.

The current logic only worked when:
  - Both the test-warehouse and metastore snapshot were present
  - Neither of them were present.
All other conditions mapped to the second case. This patch fixes the problem by applying
the correct bash test operators.

Change-Id: Ie090aefe3be14a01b1aadc0a136e870582a6379c
Reviewed-on: http://gerrit.cloudera.org:8080/235
Reviewed-by: Casey Ching <77bc9a9984e6786c5799d7a71768cf023120ef76@cloudera.com>
Tested-by: Internal Jenkins

ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC