(QE-71) print full stack traces when in --debug mode
This is a reversal of the original purpose of the bug, which was to
remove harness related parts of stack traces to make them more readable
- unfortunately it made them less readable and also made it more
  difficult to differentiate between harness and test code bugs
spec tests for install_utils and answers.rb

- increasing spec test coverage of new functionality
spacing fixes in new spec tests
Merge remote-tracking branch 'anode/stacktrace'
Merge remote-tracking branch 'anode/multi-version'