Modern elasticsearch requires to have basic_auth as well as use TLS for
connections.
Along with enabling TLS we also need to ensure that
self-signed certificate is trusted by freezer.
We also create a default user for freezer to auth with
with adding a `http_auth` config option to
the driver.
Change-Id: I0947eef734c9654da9419617ca321bfc8e33b16a
Signed-off-by: Dmitriy Rabotyagov <noonedeadpunk@gmail.com>