Title: #877: LDAP ObjectClasses are case-insensitive
In the IPA servers of the previous versions new users were created with objectClass capitalizations like 'posixAccount'.
They should be treated as matching 'posixaccount'.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/877/head:pr877
git checkout pr877