LU-2407 tests: remove the leading space in the fake nid

LU-2407 tests: remove the leading space in the fake nid

This patch fixes conf-sanity test_35a() and test_35b() to remove
the leading space ahead of the fake failover nid.

Test-Parameters: envdefinitions=SLOW=yes,ENABLE_QUOTA=yes \
clientdistro=el6 serverdistro=el6 clientarch=x86_64 \
serverarch=x86_64 serverjob=lustre-b2_3 serverbuildno=41 \
testlist=conf-sanity

Signed-off-by: Jian Yu <jian.yu@intel.com>
Change-Id: I2dd5b0274abc2aea7a5e7ee3599fbef7bcb16037
Reviewed-on: http://review.whamcloud.com/6779
Tested-by: Hudson
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>