Due to changes in BaseFeatureAdaptor we need to save the state of
meta_coord otherwise a number of tests will begin to fail. Same is
true of xref.

[ENSCORESW-478] and [ENSCORESW-467]. Brought in a Perl::Critic test being run on the lowest level. Tests are only run when we have the ENV TEST_AUTHOR is set to a true value. Otherwise it does not impact on the current test cases. Also had to fix a number of issues associcated with these flags. Mostly were due to not using warnings or strict. Anything I felt was ok or not my call has been annotated with a no critic flag.

Switched to Test::More and done_testing(). This should stop tests from failing due to poor test count specification.

added new tests to check attributes db_name and db_display_name work properly to retrieve the database_name and the displayable_name from the external database