Added isLawStudent flag to /my/badges API

Used `MyAcademics::CollegeAndLevel`  to detect is user's primary college is "School of Law," then stored result as `isLawStudent` within the `studentInfo` badge. Added RSpec test to verify working correctly.
I also think this local var "feed" would read better as "college_feed" to distinguish it from the other feed in the same block.