Makefile: Moving the mgmt makefile logic under mgmt

The mgmt/Makefile now holds the logic for the swagger-ui library and the
httpserver

Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
Makefile: Moving the mgmt Makefile functionality into mgmt module

The mgmt Makefile will run the gradle compile and clean instead of the
general Makefile.

Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
Packaging module: Moving the module.py functionality to mgmt

The functionality of building and packaging the mgmt moves from
module/mgmt to mgmt

mgmt will be treated as the module and not module/mgmt

Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>