Added utility to run mdns test cases, started switching the mdns testing to single-node case. Needs some further refactoring.
Refactored the wait/assert functionality to mydsm class, s.t. we can do single- and multi-mdns object tests using same testware.
19 covered SHOULD/MUSTs, 15 not relevant, and 126 to go.. sigh. ETA: Two weeks at this rate.