* changes:
Assorted cleanup
Simplify disconnect for cert channels
Simplify sending information requests
Add information response matchers
Move dut & cert channels into return result
Use multi-match in a few places where it makes sense
Add function to send s_frames & clean up sending
Rename L2capMatchers.InformationFrame & SupervisoryFrame
Distingiush between validated and unvalidated channels open
Simplify channel open, so it can fit on one line
Migrate i frame sending into CertL2cap
Start migrating to channel abstractions
Make ertm & fcs separable, reduce redundant code
Add function to simplify sending control packets