LU-12678 lnet: remove lnet_me_alloc/lnet_me_free

LU-12678 lnet: remove lnet_me_alloc/lnet_me_free

These functions are simple wrapper that do not benefit
readability, so remove them.

Move the DEBUJG messages to the places where allocation happens.  This
introduces only a tiny amount of code duplication.

Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: Ieb40f8a7547cba30b05c1e5e526c762e354f3c47
Reviewed-on: https://review.whamcloud.com/36910
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>