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.

Ran the RB test suite, and saw a 'rb' suite containing all tests. Also saw

such other ones as 'resources' under that, which covered all resource tests

across all the files. I was able to run each suite independently, and didn't

see any issues with nesting of tests, or any missing tests.