Fix improper use of yield in generator
Fix improper use of yield in generator

The log4mongo setup_handler was using yield incorrectly.  Yield simply
pauses execution at the point of the yield, and then the next call
continues from the point of the yield.

By yielding false at the beginning of the generator and not checking the
__opts__ for the name ( again ), it was simply continuing the execution,
even if log4mongo was not configured.

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