Ninja: fix test for js return type under rhino engine
Temporary fix for CASSANDRA-8326

This is a temporary python driver fix for CASSANDRA-8326.  The patch
has not been properly reviewed and tested by the python driver team.
The driver version bundled here can be found at the following branch:

https://github.com/thobbs/python-driver/tree/CASSANDRA-8326-temp-fix
Merge remote-tracking branch 'origin/trunk' into 7563v3-udf-types

Conflicts:
	test/unit/org/apache/cassandra/cql3/UFTest.java