Method in GeneAdaptor fetch_all_alt_alleles() was not working as it did prior to
our changes. It normally returned everything bar itself. That has been fixed.

Also stopped a warning which was driving the webteam mad.

updated test cases to check integrity of api once deprecated tables, columns and methods have been removed
test databases patched to schema 74

[ENSCORESW-479]. Making this module better at handling homologue Compara errors and also get it to die when you try to get homologues without a compara adaptor configured

Counting features over HAPs/Patches/PARs was not working. Fixed by adding a SQL based filtering stage. The normal code will not use this as it is quite nasty

Added efficiency boost to fetch_all_by_external_name and sub-methods. Wildcards now escaped in positions 1 and 3 unless user supplies override flag.

POD updated accordingly.

Added SQL wildcard support to GeneAdaptor, TranscriptAdaptor and TranslationAdaptor -> fetch_all_by_external_name()
Actual modifications in DBEntryAdaptor. Features tested through gene.t