LU-11297 lnet: invalidate recovery ping mdh

LU-11297 lnet: invalidate recovery ping mdh

For cleanliness, ensure that recovery ping mdh is invalidated when
an peer ni or a local ni are allocated

Lustre-change: https://review.whamcloud.com/34771
Lustre-commit: d7b5f3114d51d5a9d1a34f5073e0bb2d0d63d302

Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: If06448b1602b3680831244923b6b982a555159ea
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Chris Horn <hornc@cray.com>
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/36034
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>