Force change permissions before deleting directory, fixes #1493

Author: SitiSchu

src/rez/utils/filesystem.py

@@ -221,13 +221,11 @@ def _on_error(func, path, exc_info):
                 path = windows_long_path(path)
 
             parent_path = os.path.dirname(path)
-            if not os.access(parent_path, os.W_OK):
-                st = os.stat(parent_path)
-                os.chmod(parent_path, st.st_mode | stat.S_IWUSR)
+            st = os.stat(parent_path)
+            os.chmod(parent_path, st.st_mode | stat.S_IWUSR)
 
-            if not os.access(path, os.W_OK):
-                st = os.stat(path)
-                os.chmod(path, st.st_mode | stat.S_IWUSR)
+            st = os.stat(path)
+            os.chmod(path, st.st_mode | stat.S_IWUSR)
 
         except:
             # avoid confusion by ensuring original exception is reraised