Fixed a bug that caused the WaitHelper::TIMEOUT to be 0 when WAIT_TIMEOU...

...T is not set.

The line
	```TIMEOUT = ENV['WAIT_TIMEOUT'].to_i || 240```
sets ```TIMEOUT``` to 0 if the ```WAIT_TIMEOUT``` is not set because ```nil.to_i``` is evaluated to 0 and the 240 is never assigned.