openvswitch: add openvswitch-python subpackage

Requires python package.
Required by other openvswitch subpackages (like openvswitch-python).

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>
openvswitch: add openvswitch-ipsesc package back

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>