Ensure insecure config option propagated by alarm service

Fixes bug 1292130

Ensure insecure (i.e. non-cert-verifying) access over SSL to
keystone works from the alarm evaluator

(cherry picked from commit eb14d7e80502f8b57f7c79f9120cf3f30f7e872b)
Change-Id: Ice009ad97ea540afede697e9d812f1bde877dd84