CLOUDSTACK-4832. Added support for https to marvin.

advanced.cfg: Contains three additional flags "useHttps,certCAPath,certPath"
for https usage in marvin for establishing cs connection. We will use the
configuraiton under advanced.cfg provided by user to establish connection over
https. If establishing the connection over https failed, then the default certs
will be used.  or else raise the exception, the existing http will work as it
is when useHttps flag set to "False"

Signed-off-by: Santhosh Edukulla <Santhosh.Edukulla@citrix.com>
Signed-off-by: Prasanna Santhanam <tsp@apache.org>
marvin: a1b979da8 breaks formatting and pep8.

setup/dev/advanced.cfg is used by the simulator deployments that are
usually not https. disabled the http within this config file.

Signed-off-by: Prasanna Santhanam <tsp@apache.org>