Fixed AE2 integration when AE2's channels are disabled

[LeiserGeist]

I believe I properly fixed the issue referenced in #3090

The previous fix did not seem to correctly fix the issue, and resulted in a NoSuchElementException being thrown when attempting to connect an adapter to an AE2 ME Interface, when AE2's channels were disabled. Controllers don't exist when channels are disabled, thus the exception.

Prior to that commit, it checked if ME Controllers exist before defining the integration for both ME Controllers and ME Interfaces. For controllers this check was necessary, but not for interfaces. The fix removed the checks from both.

By re-implementing the check only when defining ME Controllers, this fixed the exception and allows ME Interfaces to be used when channels are disabled.

Sorry for the potentially poor description!

[LeiserGeist]

Heh, something's gone horribly wrong with the Travis instance that's checking these PRs

[Alexejhero]

Any clues on when this will be merged?

[LeiserGeist]

Looks like this was implemented at some point, closing.