test(fixtures): store all fake_ssh uploads so stopped-container bw-limits path is reachable

Upstream v1.7.7 test_stopped_container_is_not_reported_as_applied fails on
clean v1.7.7: fake_ssh only stored /clientsTable uploads, so the docker cp
of /tmp/_amnz_bwlimits raised KeyError before the deferred RuntimeError.

tests/test_clients_table_lock.py

@@ -54,9 +54,9 @@ def fake_ssh():
         return '', '', 1
 
     def upload(content, remote_path):
-        # only the clientsTable snapshot models the server's table;
-        # _apply_bw_limits uploads other files (tc scripts, bwlimits)
-        if remote_path.endswith('/clientsTable'):
+        # clientsTable staging is what models the server's table, but every
+        # upload must be stored: _apply_bw_limits uploads bwlimits/tc scripts
+        # and its docker cp reads them back before any container check.
         uploads[remote_path] = content
 
     ssh.run_sudo_command = sudo