Fix collation test to work with upcoming CouchDB 0.11 release.
Fix collation test to work with upcoming CouchDB 0.11 release.

CouchDB's handling of JavaScript's 'undefined' has changed with 0.11. Before,
an undefined emitted from a view raised an exception and the doc was dropped
from the view.  Now, undefined is serialised as null.

Application code, and therefore the unittest, are now expected to explicitly
check for 'undefined'.
zielmicha/couchdb-python,ajmirsky/couchdb-python