LU-9120 lnet: calculate the lnd timeout

LU-9120 lnet: calculate the lnd timeout

Calculate the LND timeout based on the transaction timeout
and the retry count. Both of these are user defined values. Whenever
they are set the lnd timeout is calculated. The LNDs use these
timeouts instead of the LND timeout module parameter.

Retry count can be set to 0, which means no retries. In that case the
LND timeout will default to 5 seconds, which is the same as the
default transaction timeout.

Test-Parameters: forbuildonly
Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: I5a37caa2b69df155211864735ba8b275fc2d34bb
Reviewed-on: https://review.whamcloud.com/32770
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>
Reviewed-by: Sonia Sharma <sharmaso@whamcloud.com>
Tested-by: Jenkins