PR#3364: Catch koji.AuthError and bail out

Merges #3364
https://pagure.io/koji/pull-request/3364

Related #3376
https://pagure.io/koji/issue/3376

builder/kojid

@@ -159,6 +159,10 @@ def main(options, session):
             logger.error('Session expired')
             exit_code = 1
             break
+        except koji.AuthError:
+            logger.error('Authentication error')
+            exit_code = 1
+            break
         except koji.RetryError:
             raise
         except Exception:

util/kojira

@@ -1159,6 +1159,9 @@ def main(options, session):
         except koji.AuthExpired:
             logger.warning("Session expired")
             break
+        except koji.AuthError:
+            logger.warning("Authentication error")
+            break
         except SystemExit:
             logger.warning("Shutting down")
             break