xfstests: remove 179 and 182 from parallel test

xfstests: remove 179 and 182 from parallel test

2012-11-25T11:34:51.177 INFO:teuthology.task.rbd.client.2.out:179        [failed, exit status 1] - output mismatch (see 179.out.bad)
2012-11-25T11:34:51.181 INFO:teuthology.task.rbd.client.2.out:--- 179.out       2012-11-25 10:44:54.273586464 -0800
2012-11-25T11:34:51.181 INFO:teuthology.task.rbd.client.2.out:+++ 179.out.bad   2012-11-25 11:34:41.360151613 -0800
2012-11-25T11:34:51.181 INFO:teuthology.task.rbd.client.2.out:@@ -1 +1,5 @@
2012-11-25T11:34:51.181 INFO:teuthology.task.rbd.client.2.out: QA output created by 179
2012-11-25T11:34:51.182 INFO:teuthology.task.rbd.client.2.out:+umount: /tmp/cephtest/scratch_mnt.WNYZwsbUfT: device is busy.
2012-11-25T11:34:51.182 INFO:teuthology.task.rbd.client.2.out:+        (In some cases useful info about processes that use
2012-11-25T11:34:51.182 INFO:teuthology.task.rbd.client.2.out:+         the device is found by lsof(8) or fuser(1))
2012-11-25T11:34:51.182 INFO:teuthology.task.rbd.client.2.out:+failed to unmount /dev/rbd2
2012-11-25T11:34:52.587 INFO:teuthology.task.rbd.client.2.out:182        [failed, exit status 1] - output mismatch (see 182.out.bad)
2012-11-25T11:34:52.591 INFO:teuthology.task.rbd.client.2.out:--- 182.out       2012-11-25 10:44:54.293587298 -0800
2012-11-25T11:34:52.591 INFO:teuthology.task.rbd.client.2.out:+++ 182.out.bad   2012-11-25 11:34:42.770180618 -0800
2012-11-25T11:34:52.592 INFO:teuthology.task.rbd.client.2.out:@@ -1 +1,5 @@
2012-11-25T11:34:52.592 INFO:teuthology.task.rbd.client.2.out: QA output created by 182
2012-11-25T11:34:52.592 INFO:teuthology.task.rbd.client.2.out:+umount: /tmp/cephtest/scratch_mnt.WNYZwsbUfT: device is busy.
2012-11-25T11:34:52.592 INFO:teuthology.task.rbd.client.2.out:+        (In some cases useful info about processes that use
2012-11-25T11:34:52.592 INFO:teuthology.task.rbd.client.2.out:+         the device is found by lsof(8) or fuser(1))
2012-11-25T11:34:52.592 INFO:teuthology.task.rbd.client.2.out:+failed to unmount /dev/rbd2