Use jasmine.suites for all Review Board JavaScript unit tests.

This switches all our unit tests to use the new jasmine.suites utility
library. It breaks down all the '/'-separated paths for each file's test
namespace into test suites and combines them to make it easier to suites
spread out across files.

All existing suites are placed under a 'rb/' namespace, which will make
it easier to distinguish Review Board tests from Djblets or other
modules.

Reviewed at https://reviews.reviewboard.org/r/5728/