revert RefSeqCoordinateParser to master branch version

Created by: tgrego

Description

RefSeqCoordinateParser has been updated, but no tests available yet. Thus RefSeqCoordinateParser is being reversed in this branch for merge with master to be issue free. The work done on RefSeqCoordinateParser is still availabe on the ensembl-xref repo, and backporting should be performed on it's own.

Use case

See ENSCORESW-3220

Benefits

Salvage more work from the 2018 xref sprint.

Possible Drawbacks

none I can see

Testing

Have you added/modified unit tests to test the changes? no If so, do the tests pass/fail? yes Have you run the entire test suite and no regression was detected? yes