Load the command line arguments, if any, from suite.yaml, rather
than keep them hard-coded in test.py.
This is allows operations team to have easier access to these.
Note I had to sacrifice dynamic smp count for mutation_reader_test
(the new smp count is fixed at 3) since this is part
of test configuration now.
1. Move tests to test (using singular seems to be a convention
in the rest of the code base)
2. Move boost tests to test/boost, other
(non-boost) unit tests to test/unit, tests which are
expected to be run manually to test/manual.
Update configure.py and test.py with new paths to tests.
