[2.7] Fix auth test (#4315)

Following changes in #4301 we will
generate a signature.json that CI should expect.

### Description

Fix ci

### Types of changes
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [x] Non-breaking change (fix or new feature that would not break
existing functionality).
- [ ] Breaking change (fix or new feature that would cause existing
functionality to change).
- [ ] New tests added to cover the changes.
- [ ] Quick tests passed locally by running `./runtest.sh`.
- [ ] In-line docstrings updated.
- [ ] Documentation updated.

Co-authored-by: Chester Chen <512707+chesterxgchen@users.noreply.github.com>

Author: YuanTingHsieh

tests/integration_test/data/test_configs/authorization/shell_commands.yml

@@ -13,7 +13,7 @@ tests:
         "admin_user_name": "admin@a.org"
         "result":
           "type": "admin_api_response"
-          "data": "audit.log daemon_pid.fl local log.json log.txt log_error.txt pid.fl readme.txt startup transfer"
+          "data": "audit.log daemon_pid.fl local log.json log.txt log_error.txt pid.fl readme.txt signature.json startup transfer"
       - "trigger":
           "type": "server_log"
           "data": "Server started"
@@ -28,7 +28,7 @@ tests:
         "actions": [ "shell_commands ls site-1" ]
         "result":
           "type": "admin_api_response"
-          "data": "audit.log daemon_pid.fl local log.json log.txt log_error.txt pid.fl readme.txt startup transfer"
+          "data": "audit.log daemon_pid.fl local log.json log.txt log_error.txt pid.fl readme.txt signature.json startup transfer"
       - "trigger":
           "type": "server_log"
           "data": "Server started"