"compatibility" readMode now causes the shell to detect whether or not
to use find/getMore commands based on wire version. "commands" mode
forces use of the find/getMore commands, and "legacy" mode forces uses
of legacy OP_QUERY/OP_GET_MORE reads.
Also configures tests to force use of "commands" or "legacy" mode as
appropriate.
Split out the passthrough tests into separate suites. The MongoDB
deployment is started up by resmoke.py so that we can record the
success/failure of each individual test in MCI.
Added support for parallel execution of tests by dispatching to
multiple MongoDB deployments.
Added support for grouping different kinds of tests (e.g. C++ unit
tests, dbtests, and jstests) so that they can be run together. This
allows for customizability in specifying what tests to execute when
changes are made to a particular part of the code.
