Move copy_env_files to utils

Use os.path.join purely to join the path, use of
format is not required.

Change-Id: I20db5526cb9c805cd65be154caff1eee0c66b3c1

tripleoclient/utils.py

@@ -2772,3 +2772,20 @@ def build_image_params(env_files, parsed_args, new_tht_root, user_tht_root):
     )
 
     return image_params
+
+
+def copy_env_files(files_dict, tht_root):
+    file_prefix = "file://"
+
+    for full_path in files_dict.keys():
+        if not full_path.startswith(file_prefix):
+            continue
+
+        path = full_path[len(file_prefix):]
+
+        if path.startswith(tht_root):
+            continue
+
+        relocate_path = os.path.join(tht_root, "user-environments",
+                                     os.path.basename(path))
+        safe_write(relocate_path, files_dict[full_path])

tripleoclient/v1/overcloud_deploy.py

@@ -260,7 +260,7 @@ class DeployOvercloud(command.Command):
                 cleanup=(not parsed_args.no_cleanup))
 
         # Copy the env_files to tmp folder for archiving
-        self._copy_env_files(env_files, new_tht_root)
+        utils.copy_env_files(env_files, new_tht_root)
 
         if parsed_args.limit:
             # check if skip list is defined while using --limit and throw a
@@ -304,24 +304,6 @@ class DeployOvercloud(command.Command):
 
         self._unprovision_baremetal(parsed_args)
 
-    def _copy_env_files(self, files_dict, tht_root):
-        file_prefix = "file://"
-
-        for fullpath in files_dict.keys():
-
-            if not fullpath.startswith(file_prefix):
-                continue
-
-            path = fullpath[len(file_prefix):]
-
-            if path.startswith(tht_root):
-                continue
-
-            reloc_path = os.path.join(
-                tht_root,
-                "user-environments/{}".format(os.path.basename(path)))
-            utils.safe_write(reloc_path, files_dict[fullpath])
-
     def _try_overcloud_deploy_with_compat_yaml(self, tht_root, stack,
                                                stack_name,
                                                env_files, timeout,