fix unit tests after changes in framework
refactor extra_options in existing easyblocks
enhance unit tests to verify type of return value of extra_options() static method
refactor to make all extra_options return a list of tuples rather than a dict, conform the framework v1.x API
don't hardcode default values for extra options
fix typo
Merge pull request #378 from boegel/fix_unit_tests

fix unit tests after changes in framework