module: append `application_name` to HYDRA_DBI

This will make it easier to track specifically where queries are being made from (assuming a log_line_prefix that includes %a in the postgres configuration).

Created by  Cole Helbling  on March 3, 2021
O5TMFOUSOMVYAA6H73K23W47PSNAB6QKCI2J3VOAKQHPWJ2WF4RQC
Change contents