LU-9201 tests: don't check network for localhost

LU-9201 tests: don't check network for localhost

Don't try to check if the network to the local host is up, since
this just wastes time and adds noise to the test output logs.

Remove ancient 1.8 compatibility check.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I6c1f8df613afd657155da1309525e75b9d1c5bae
Reviewed-on: https://review.whamcloud.com/29011
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Steve Guminski <stephenx.guminski@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>