LU-7418 tests: cancel all locks in sanity test_29

LU-7418 tests: cancel all locks in sanity test_29

Cancel both MDC and OSC locks in sanity.sh test_29, since any
background writeout of dirty pages under OSC locks will request
a layout lock from the MDS, causing the test to fail.

Test-Parameters: trivial testlist=sanity,sanity,sanity,sanity
Test-Parameters: testlist=sanity,sanity,sanity,sanity
Test-Parameters: testlist=sanity,sanity,sanity,sanity
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Ie2cc1b241d5fac5b439509a3d01384f6a531e654
Reviewed-on: http://review.whamcloud.com/20741
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>