LU-13501 tests: Add tests for LNet health and resends

LU-13501 tests: Add tests for LNet health and resends

Simulate all LNet health error statuses and validate that LNet health
modifies NI health values or attempts resends as appropriate for both
single-rail and multi-rail configurations.

Test-Parameters: trivial testlist=sanity-lnet
HPE-bug-id: LUS-8826
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: Ice705c073deefed00b20011dea5de834cf6f0984
Reviewed-on: https://review.whamcloud.com/38633
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Alexander Boyko <alexander.boyko@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>