Updating group 80, test cases 60 and 70 to reflect test specification

It looks like 80.60 and 80.70 may have gotten switched around a little.

I've changed 80.60 to be much simpler. It now verifies simply that the features_request / reply dialogue works.

The code that was previously in 80.60 did a lot of features_reply verification. I've moved that code into 80.70 which requires verification of fields inside the feature_reply message.