init: http/https in management_server

As we do use the address and port to communicate with engine,
strip http/https in the management_server string.

The logic is if not port is set in management_server we do use 443.

Change-Id: Ibdc18d1824a7fe96d3452d7e80b419e1f94a9eac
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1128722
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>