LU-1341 tests: recovery-small test_19* fixes

LU-1341 tests: recovery-small test_19* fixes

- test 19a uses ELC, so no eviction happens;
- test 19b cancels conflicting lock in advance due to CLIO logic,
  no eviction again;

fix tests to check what is expected - eviction must take place.

Change-Id: Ib5365c9f90d1fc388fe81196661b262da5e7ad78
Xyratex-bug-id: MRP-482
Reviewed-by: Alexander Zarochentsev <alexander_zarochentsev@xyratex.com>
Reviewed-by: Alexander Lezhoev <Alexander_Lezhoev@xyratex.com>
Signed-off-by: Vitaly Fertman <vitaly_fertman@xyratex.com>
Reviewed-on: http://review.whamcloud.com/2592
Tested-by: Hudson
Reviewed-by: Jinshan Xiong <jinshan.xiong@whamcloud.com>
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>