LU-12932 tests: remove obsolete qos.sh test script

The qos.sh test script is broken for a number of reasons:
- hard coded filesystem name
- uses old positional parameters for lfs setstripe
- sets parameters on client that should be set on MDS

and is duplicated by sanity test_116a.  Remove it.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I3d4b795a65f6fbb4398f76f4a533d753700cab07
Reviewed-on: https://review.whamcloud.com/36666
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Tested-by: Maloo <maloo@whamcloud.com>