remove trailing newlines form python modules

pylint-1.6.4-1.fc26.noarch reports these, hence they should be fixed in order
to build FreeIPA with this version

https://fedorahosted.org/freeipa/ticket/6391

Reviewed-By: Martin Basti <mbasti@redhat.com>

ipalib/request.py

@@ -77,4 +77,3 @@ def destroy_context():
         if isinstance(value, Connection):
             value.disconnect()
     context.__dict__.clear()
-