fixes bugs: adds __init__.py to linux,
fixes default pathes to keys,
fixes share deletions with non admin context,
deletes port for service instance if 'setup_connectivity fails',
fixes share deletion if it has no share network but has access rules,

Change-Id: Ia0b99cda4b383690868270d5c39252133143fe0c
fixes default vif driver name

Change-Id: I4399bbc4e01a8a2fa75a471d54c3d0de4af020f0