LU-7005 tests: wait client imports fully recovered

LU-7005 tests: wait client imports fully recovered

In conf-sanity.sh 50i, it should wait client and all MDTs recover
before creating files.

Signed-off-by: Lai Siyao <lai.siyao@intel.com>
Signed-off-by: wang di <di.wang@intel.com>
Change-Id: I637ebfb6c531708e194df4c03d8657361d1b40ee
Reviewed-on: http://review.whamcloud.com/15983
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>