remove_exporter class not idempoptent

[MartyEwings]

Once the the exporter remove class has been run on a primary or replica, subsequent runs show failures:

Error: Error executing SQL; psql returned pid 23460 exit 1: 'ERROR: role "rsan" does not exist
'
Error: /Stage[main]/Rsan::Remove_exporter/Pe_postgresql_psql[DROP OWNED BY rsan on pe-activity]/command: change from to 'DROP OWNED BY rsan' failed: Error executing SQL; psql returned pid 23460 exit 1: 'ERROR: role "rsan" does not exist
' (corrective)
Error: Error executing SQL; psql returned pid 23462 exit 1: 'ERROR: role "rsan" does not exist
'
Error: /Stage[main]/Rsan::Remove_exporter/Pe_postgresql_psql[DROP OWNED BY rsan on pe-classifier]/command: change from to 'DROP OWNED BY rsan' failed: Error executing SQL; psql returned pid 23462 exit 1: 'ERROR: role "rsan" does not exist
' (corrective)
Error: Error executing SQL; psql returned pid 23464 exit 1: 'ERROR: role "rsan" does not exist
'
Error: /Stage[main]/Rsan::Remove_exporter/Pe_postgresql_psql[DROP OWNED BY rsan on pe-inventory]/command: change from to 'DROP OWNED BY rsan' failed: Error executing SQL; psql returned pid 23464 exit 1: 'ERROR: role "rsan" does not exist
' (corrective)
Error: Error executing SQL; psql returned pid 23466 exit 1: 'ERROR: role "rsan" does not exist
'
Error: /Stage[main]/Rsan::Remove_exporter/Pe_postgresql_psql[DROP OWNED BY rsan on pe-puppetdb]/command: change from to 'DROP OWNED BY rsan' failed: Error executing SQL; psql returned pid 23466 exit 1: 'ERROR: role "rsan" does not exist
' (corrective)
Error: Error executing SQL; psql returned pid 23469 exit 1: 'ERROR: role "rsan" does not exist
'
Error: /Stage[main]/Rsan::Remove_exporter/Pe_postgresql_psql[DROP OWNED BY rsan on pe-rbac]/command: change from to 'DROP OWNED BY rsan' failed: Error executing SQL; psql returned pid 23469 exit 1: 'ERROR: role "rsan" does not exist
' (corrective)
Error: Error executing SQL; psql returned pid 23472 exit 1: 'ERROR: role "rsan" does not exist
'
Error: /Stage[main]/Rsan::Remove_exporter/Pe_postgresql_psql[DROP OWNED BY rsan on pe-orchestrator]/command: change from to 'DROP OWNED BY rsan' failed: Error executing SQL; psql returned pid 23472 exit 1: 'ERROR: role "rsan" does not exist
' (corrective)

the class is supposed to be removed to uninstall the module so this is low priority