regression test: Fix regression tests when using in tree parser

When using the in tree parser we should not be using the system parser.conf file, as if the system apparmor is newer than the tree being tested the parser.conf file could contain options not understood by the in tree apparmor_parser.

Use --config-file to specify the default in tree parser.conf

Signed-off-by: John Johansen john.johansen@canonical.com