UBUNTU: SAUCE: fuse: Don't initialize user_id or group_id in mount options

BugLink: http://bugs.launchpad.net/bugs/1566505



These are required mount options, thus there is no need to
initialize the values in struct fuse_mount_data.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>