LU-7664 test: set_conf_param_and_check() defect

LU-7664 test: set_conf_param_and_check() defect

set_conf_param_and_check() should wait update on facet_active_host
instead of facet_host; othewise tests failed on configuration
facet_HOST != facetfailover_HOST

Seagate-bug-id: MRP-2846
Signed-off-by: Elena Gryaznova <elena.gryaznova@seagate.com>
Reviewed-by: Sergey Cheremencev <sergey.cheremencev@seagate.com>
Reviewed-by: Vitaly Fertman <vitaly.fertman@seagate.com>
Change-Id: I974f145b3783fec1adb2fc6219ef4bd025a31811
Reviewed-on: http://review.whamcloud.com/17995
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>