The default apache2 environment, and therefore the default WSGI
environment, sets LANG=C. For languages beyond the scope of ASCII
this can create problems.
Explicitly set the lang and locale to C.UTF-8 which will support all
UTF-8 language sets.
Change-Id: I110cc089fa7d51dfd513c630cb28cd49b330bf6f
Closes-Bug: #1933109