corrected DataFlowRuleAdpator methof injection, _get_branch_number now validates branch codes are defined, added some debug statements,
corrected DataFlowRuleAdpator methof injection, _get_branch_number now validates branch codes are defined, added some debug statements,

Ensembl/ensembl-funcgen,Ensembl/ensembl-funcgen,Ensembl/ensembl-funcgen,Ensembl/ensembl-funcgen