tests: fix nightly test config after #2611 (#2614)

remove namespace from minio config to match settings

Author: ikreymer

chart/test/test-nightly-addons.yaml

@@ -20,7 +20,7 @@ storages:
     secret_key: "PASSW0RD"
     bucket_name: *local_bucket_name
 
-    endpoint_url: "http://local-minio.default:9000/"
+    endpoint_url: "http://local-minio:9000/"
     is_default_primary: true
     access_endpoint_url: "/data/"
 
@@ -30,7 +30,7 @@ storages:
     secret_key: "PASSW0RD"
     bucket_name: "replica-0"
 
-    endpoint_url: "http://local-minio.default:9000/"
+    endpoint_url: "http://local-minio:9000/"
     is_default_replica: true