This change adds schemes https:// to the alarm notifier.
By default, the server certificate is verified like a browser does
but with the system CA.
A client certificate can be set in the configuration file.
[alarm]
rest_notifier_certificate_file = /path/certificate.pem
rest_notifier_certificate_key = /path/private_key.pem
Change-Id: Id06e0a45ef88c15674052faeb941d87b70c7b99b
Blueprint: alarm-notifier
fc9b416a47