The test left undropped databases after itself which caused unnecessary
work with repeated runs. Also removed the somewhat superficial wait at the
start of the test.
See script directory for method. The script to run in the top level
MaxScale directory is called maxscale-uncrustify.sh, which uses
another script, list-src, from the same directory (so you need to set
your PATH). The uncrustify version was 0.66.
The test dropped the 'test' database which is heavily used both for
checking functionality and running tests. A better alternative is to use a
custom database that is only used by this test.
