Test result parsing: don't make configuration variables static

Make sure the configuration variables are non-static, as commented by
rsandell.
Test result parsing: do not add to statistics

Do not add failure causes originating from failed test cases to the
statistics, to avoid problems due to these causes not being present in
the known causes database.
Test result parsing: put configuration descriptions in separate keys

Instead of placing long descriptions directly in config.jelly,
especially when there are parentheses (and associated escaping)
involved, use a key and place the actual description in
config.properties.