Coverage for meterpreter and client core, just the bits I'm changing. I
intend to make liberal use of doubles, since they're easier than mocks
and all I care about is the changed behavior. I refuse to fall into a
trap where I need to first spec out aaaaaalllll of Metepreter just to
make this one change.
Fixes deprecation warnings in newer rspec like these
WARNING: subject accessed in a `before(:all)` hook at:
/metasploit-framework/spec/lib/rex/post/meterpreter/packet_spec.rb:455:in `block (3 levels) in <top (required)>'
This is deprecated behavior that will not be supported in RSpec 3.
Also switches to using named subjects for easier reading.
Chris Doughty