Added/completed variables for database parameters.
Added/completed variables for database parameters.

Ensembl/ensembl-analysis,james-monkeyshines/ensembl-analysis,Ensembl/ensembl-analysis,james-monkeyshines/ensembl-analysis,kiwiroy/ensembl-analysis,james-monkeyshines/ensembl-analysis,Ensembl/ensembl-analysis,kiwiroy/ensembl-analysis