A user reported encoding errors in their logs when attempting to log in a new user when connected to LDAP. The issue here was that data returned from ldap was `bytes`, but we were attempting to split it using a `unicode` splitter. According to the ldap documentation, field names are returned as the text type, but attribute values will be bytestrings. The documentation is a unclear in that it also claims that "text values" will be the unicode type. In order to accomodate potentially different behavior across Python versions, all values have been wrapped in `force_text`. The unit tests have been updated to supply the expected (bytes) types for values. Testing Done: Ran unit tests on Python 2.7 and 3.8.