Enscoresw 1971 transl_table qualifier added to genbank and embl flat file dumps

Added abstract method _tables implementation to TranslationAdaptor as…

Updates to add projection parent as attributes in gtf and gff dumps -…

Further updates to include transl_table in flat files - changed method call to _get_codon_table_id - ENSCORESW-1971

For MySQL version 5.6 and above,  FLUSH TABLES is not permitted when there is an active READ LOCK. Added new code to run a FLUSH WITH READ LOCK for MySQL version 5.6 and above

Updates to include projection parent id in GTF dumps - attribute code…

Added abstract method _tables implementation to TranslationAdaptor as needed by generic_count in BaseAdaptor - ENSCORESW-1995

added multi-species database support

Updates to include projection parent id in GTF dumps - attribute codes proj_parent_g, proj_parent_t added to the dumps if available - ENSCORESW-2003

Fixed bug in set_gene_descriptions where filtered descriptions were b…

Enscoresw 1844 - allow SliceAdaptor to consider negative coordinates, as well as open-ended ranges

Updated documentation in POD for the routine parse_location_to_values - Further updates to ENSCORESW-1844

Feature/searchbyontologylinkage

Enscoresw 1481 - allow mapper to return original coordinates as well as mapped coordinates in the result

New schema patches to allow the ensembl_ontology schema to work on ne…

[ENSCORESW-1997]. Enable local load data feature at the specific driv…

Replace deprecated Variation method

Unfortunately, creating an appropriate test turns out to be extremely incovenient
as one must make sure the underlying DBD::mysql has been compiled against a C library
where this feature is turned off.

This approach has been tested at the base class level and it seems to be working, so this
is more for:
- the team to quickly have a look and make appropriate suggestions;
- Andy Y to set up a proper test environment, run a test and confirm, as we've discussed.