ocg: Temp hack to fix empty redis password, take 2

https://gerrit.wikimedia.org/r/#/c/176181/ didn't actually
have any effect at all. Perhaps the bug is in our heira
backend, and it somehow sets the password to ''?

This patch should verify that.

Change-Id: I0df8f404f50617cf2acbba2925553c9369d43341