Use non-zero timeout in update method and don't ignore exceptions.
Use non-zero timeout in update method and don't ignore exceptions.

Timeout in update method was set to 0 which doesn't mean no timeout.
As a result update might not work on loaded systems or slow network.
Also timeout exception was silently ignored.
Now sreq.send() is used in the same way as in other methods.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt