Add wsgi.py files to setup.cfg isort ignore

The order of imports matters in these files. I'm adding it to the "skip" list to
prevent issues with future runs of isort on the codebase.

setup.cfg

@@ -45,4 +45,6 @@ skip=
     envs
     migrations
     common/lib/safe_lxml/safe_lxml/etree.py
+    wsgi.py
+    wsgi_apache_lms.py
 known_first_party=calc,capa,chem,dogstats_wrapper,safe_xml,symmath,xmodule