Use rspec style output for xcpretty on Travis
Use rspec style output for xcpretty on Travis

Otherwise there are lots of extra info which mkaes it harder to review
failing tests.

otaran/FormatterKit,mattt/FormatterKit,twobitlabs/FormatterKit,mattt/FormatterKit,otaran/FormatterKit,twobitlabs/FormatterKit,twobitlabs/FormatterKit,otaran/FormatterKit,mattt/FormatterKit