This feature will enable the installation of OSM with
charms on top of Kubernetes (microk8s by default).

Instructions to test this before Merge:

Change path to local full_install_osm.sh in
line 145 in install_osm.sh

Change path to local charmed_install.sh and
charmed_uninstall.sh in line 1285 and 1287 in
full_install_osm.sh

Afterwards, just execute:
./install_osm.sh --charmed

For uninstall
./install_osm.sh --uninstall

Change-Id: I6dfe0831ea5e2c265a365b41638e807106076346
Signed-off-by: Dominik Fleischmann <dominik.fleischmann@canonical.com>