1. Update password value to fit value check
2. Remove cases in backup e2e: remove backup by volume which is used by instance
3. Update waittime for fip list page to ensure create form can be opened
4. Update image select when create instance
5. Add volume case：create backup and backup inc
6. Update force delete instance command
Change-Id: I45e4bba0b670171860d85e4e5cb402962a41becd
