LU-14955 lnet: Use fatal NI if none other available

LU-14955 lnet: Use fatal NI if none other available

Allow NI in fatal state to be selected for sending if there are no
NIs in non-fatal state.

Test-Parameters: trivial testlist=sanity-lnet
HPE-bug-id: LUS-11019
Signed-off-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: Iab8ef6ee5c5f45896196dbd88a2f61e004278297
Reviewed-on: https://review.whamcloud.com/44746
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Cyril Bordage <cbordage@whamcloud.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>