LU-15169 Revert "LU-14668 lnet: Lock primary NID logic"

LU-15169 Revert "LU-14668 lnet: Lock primary NID logic"

This patch breaks client mounts under certain LNet configurations.

This reverts commit 024f9303bc6f32a3113357c864765c4f9c93ed03.

Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: Ic1f1d07694fe49df14c803a9434d673e61c7dd67
Reviewed-on: https://review.whamcloud.com/45386
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andriy Skulysh <andriy.skulysh@hpe.com>
Reviewed-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>
Reviewed-by: Amir Shehata <ashehata@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>