fix env of rc apps job

rocketchat/manifests/apps-job.yml

@@ -13,12 +13,12 @@ spec:
           env:
             - name: HOST
               value: http://${FQDN}-app:3000
-            - name: USER
+            - name: USERNAME
               valueFrom:
                 configMapKeyRef:
                   key: ADMIN_USERNAME
                   name: ${FQDN}-config
-            - name: PASS
+            - name: PASSWORD
               valueFrom:
                 secretKeyRef:
                   key: ADMIN_PASS