Revert the change to the recaptcha import test.

Review Request #5776 — Created May 6, 2014 and submitted — Latest diff uploaded

Information

Review Board
release-2.0.x
a1982ed...

Reviewers

For some mysterious reason, recaptcha doesn't always work with
imp.find_module(). It works fine in my virtualenv, but not in Christian's,
despite everything looking very similar.

This changes our test back to using 'import', and crucially adds a comment
explaining why we use that over imp.find_module().