fix a few small issues with walkthrough tests

These are all pretty basic. 
- We do not print out over 100 lines of output anymore when -v debug is specified. it is about 73 lines now. This may have decreased because we are batching commands now.
- For testHostCommands, ps -a changed slightly because we are using ptys. everything except for the ps process itself is identical.
If this is the behavior on 12.04 tshark, then it's probably fine - otherwise you might want to make sure you accept either variant.