LU-1410 test: Allow sanity test 200 to work with one OST

LU-1410 test: Allow sanity test 200 to work with one OST

The sanity test is failing test 200 with one OST. When
the test adds machines to the pool it is not passing
valid arguments.

Changing TGTPOOL_FIRST=0 is allowing the test to run.

Signed-off-by: Keith Mannthey <keith@whamcloud.com>
Change-Id: I0709429e7888d0b3d90a0160778ca6224d9cb12e
Reviewed-on: http://review.whamcloud.com/3731
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Minh Diep <minh.diep@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>