Added support for full tests. Something like:
../testbed/testsuite/tbtest -full run tbdb frontend testbed chris \ "10 pc 16 shark" it will then reserve 10 pcs and 16 sharks (or fail) and then run all the tests using those nodes. This doesn't quite work yet. It's awaiting an update of tmcc/tmcd to have nodes look at the other DB. Also made it a little more forgiving about the test DB being left around.