LU-4517 tests: get params directly in _wait_osc_import_state

LU-4517 tests: get params directly in _wait_osc_import_state

In _wait_osc_import_state(), if the facet is not a client node,
go to get osc.*.ost_server_uuid params directly and quickly,
without waiting $maxtime seconds.

Signed-off-by: Emoly Liu <emoly.liu@intel.com>
Change-Id: Idf5989f53d050edcb69690b7f24a6e86df233bef
Reviewed-on: http://review.whamcloud.com/8989
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>