LU-11981 lnet: clean up error message

LU-11981 lnet: clean up error message

There are instances when the message can be canceled. In this
case we do not want that to impact the interface health or output
an error message for it, as it could be noisy. Therefore, reduce
the message which logs this case from error to debug

Test-Parameters: trivial
Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: I586dbfcdcfa38994db99dc5983240b38c9ee2770
Reviewed-on: https://review.whamcloud.com/37001
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>