LU-15363 tests: don't use lustre module to test lnet

LU-15363 tests: don't use lustre module to test lnet

Currently sanity-lnet.sh loads the lustre modules to properly
initialize the lnet modules. This doesn't work with the native
Linux client since it only starts up LNet after mounting the
file system. We shouldn't be using lustre to test lnet so
load lnet modules with config_on_load option to properly setup
the default LNet configuration.

Also fix ksocklnd-config to use bash so sanity-lnet.sh can
pass on Ubuntu.

Test-Parameters: trivial testlist=sanity-lnet
Change-Id: Ifffc51625f5c2ffbb3ab811b75739c0e6407a821
Signed-off-by: James Simmons <jsimmons@infradead.org>
Reviewed-on: https://review.whamcloud.com/45834
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>