Adding dbport and backend to JediDBProxy.
Taking backend from jedi_config.db (instead of panda_config) for bindValuesExpression in JediFileSpec and JediTaskSpec.
Taking backend from jedi_config.db (instead of panda_config) for bindValuesExpression in JediDatasetSpec.
Added varMap definition in JediDBProxy.getTaskIDsWithCriteria_JEDI().