LU-11816 lnet: setup health timeout defaults

LU-11816 lnet: setup health timeout defaults

Enable health feature by default.
Setup transaction timeout to a default 10 seconds and
retry count to 3 when health is enabled. When health
is disabled set default transaction timeout to 50.
When toggling between health enabled/disabled the defaults
will always kick in.

Test-Parameters: forbuildonly
Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: I153c2822898b44e33871ec827de7e61f153bb1db
Reviewed-on: https://review.whamcloud.com/34252
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>
Tested-by: Jenkins
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Chris Horn <hornc@cray.com>