Merge pull request #515 from gnuoy/issue/514

Return deepcopy of test config

zaza/charm_lifecycle/utils.py

@@ -14,6 +14,7 @@
 
 """Utilities to support running lifecycle phases."""
 import collections
+import copy
 import importlib
 import logging
 import os
@@ -407,15 +408,15 @@ def get_charm_config(yaml_file=None, fatal=True, cached=True):
         else:
             yaml_file = DEFAULT_TEST_CONFIG
     if cached and yaml_file in _charm_config:
-        return _charm_config[yaml_file].copy()
+        return copy.deepcopy(_charm_config[yaml_file])
     try:
         with open(yaml_file, 'r') as stream:
             content = yaml.safe_load(stream)
             _charm_config[yaml_file] = content
             if "tests_options" in content:
                 zaza.global_options.merge(content["tests_options"],
                                           override=True)
-            return content.copy()
+            return copy.deepcopy(content)
     except OSError:
         if not fatal:
             charm_name = os.path.basename(os.getcwd())