LU-1145 test: add Test-Parameters tag for autotest

Allow Test-Parameters line to specify extra tests that should be run
to properly validate a change made to code or a regression test.

The Test-Parameters line can be quite long, depending on the number
of parameters specified.  A single set of test parameters can be
split over multiple lines by escaping the linefeed, though the
individual lines should still be kept below the 70-character limit.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I65e1d41ad0f487df3753f25d9111ade9a0af08b1
Reviewed-on: http://review.whamcloud.com/2176


Reviewed-by:  <bruce.korb@gmail.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Chris Gearing <chris@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>