replace mds1 with SINGLEMDS according to andreas advice

cMD_PRE_CMD_SMASH are the relevant tags.

The pre-smashing contents of HEAD will be committed by yury into b_cmd as a
merge of the two branches.  These will be stabilized on b_cmd and eventually
landed onto HEAD.

b=2094, b=3138, b=3335, b=3274, b=3293, b=2862, b=3147, b=2350, b=3313
b=3265, b=3315, b=3301, b=3325, b=3329, b=3125, b=3098

that my root filesystem doesn't fill up with all the different files.

again.

Increase OSTSIZE to 50MB, so replay-ost-single.sh doesn't fill the
filesystem.

r=shaver

Add --ptldebug and --subsystem to lmc.

Add a test to recovery-small to trigger this bug. Also fix some
typos/brainos in recovery-small and test-framework, and set the debug
level to the default for local configs,

  now run in a local, single node mode by default.

- Add some tests for old bugs to recovery-small.sh. These tests were
  in the ltest/recovery scripts, but that is now unused.

- Move the OBD_FAIL funcs to test-framework.

- add the -v command line option for test scripts; it will print out
  the commands its executing on the nodes.