added checks in get_Gene and get_Transcript that the genome_db and core db_adaptor are properly defined.  throws exception if not.
added checks in get_Gene and get_Transcript that the genome_db and core
db_adaptor are properly defined.  throws exception if not.

kumarsaurabh20/ensembl-compara,kumarsaurabh20/ensembl-compara,Ensembl/ensembl-compara,kumarsaurabh20/ensembl-compara,danstaines/ensembl-compara,danstaines/ensembl-compara,dbolser-ebi/ensembl-compara,Ensembl/ensembl-compara,kumarsaurabh20/ensembl-compara,Ensembl/ensembl-compara,danstaines/ensembl-compara,ckongEbi/ensembl-compara,dbolser-ebi/ensembl-compara,etapanari/ensembl-compara,ckongEbi/ensembl-compara,etapanari/ensembl-compara,dbolser-ebi/ensembl-compara,ckongEbi/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,etapanari/ensembl-compara,etapanari/ensembl-compara,danstaines/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,danstaines/ensembl-compara