Revert "Merge pull request #4583 from dimagi/parent-select"

This reverts commit ca9a48f3030e3f815d824fe0d308f197cf4705ab, reversing
changes made to 71f45a53b53a6ffb83ab6b887e3f86a88224e292.
add assertXmlPartialEqual
allow selecting Advanced Modules as parent modules
pep8
Merge pull request #4591 from dimagi/parent-select

allow selecting Advanced Modules as parent modules