LU-16280 tests: conf-sanity/117 call setup when FS is not mounted

LU-16280 tests: conf-sanity/117 call setup when FS is not mounted

conf-sanity/117 calls setup() funciton to setup LustreFS
regardless of the previous state of conf-sanity. Currently
test before conf-sanity/117 leaves state of conf-sanity
as not mounted. However, this make test case highly
depenending on previous state. Specially if tests are
unrelated.

This patch checks the state of LustreFS before calling
setup.

Test-Parameters: trivial fstype=zfs testlist=conf-sanity env=ONLY="112 115 116 117"
Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: I40c2b91f9cf5138f0f3c377fd222d092b37d1c12
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/48989
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>