LU-8524 tests: Awk command re-structured to pass correct value

LU-8524 tests: Awk command re-structured to pass correct value

Variable "selinux_policy" was having incorrect value passed to
it due to inappropriate structuring of couple of commands.
Both those commands have been restructured in order to have the
correct value passed to the variable "selinux_policy".
Test was run with this modified piece of code successfully,
and the result for it can be found in comments section of the
ticket.

Test-Parameters: trivial testlist=sanity-selinux,sanity-selinux,sanity-selinux
Signed-off-by: Saurabh Tandan <saurabh.tandan@intel.com>
Change-Id: I3c6c86d607edeadd03ab694435fb201c08c23654
Reviewed-on: http://review.whamcloud.com/22070
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Wei Liu <wei3.liu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>