qa/vstart_runner: don't pass sudo for ceph-fuse command

qa/vstart_runner: don't pass sudo for ceph-fuse command

Since we pass option "--client_die_on_failed_dentry_invalidate=false"
to ceph-fuse commands issued by vstart_runner.py, passing "sudo" in
ceph-fuse command arguments is unnecessary.

This removes the error message (see below) from vstart_runner.py output
that informs the users that "sudo" was removed from command arguments.
This message is redundant and even misleading as the option above
is passed to ceph-fuse command.

This will have no functional changes on ceph-fuse mount command issued
by vstart_runner.py since FuseMount._run_mount_cmd() did not pass
"omit_sudo=False" (and since default value for omit_sudo in method
LocalRemote.run() of vstart_runner.py is true, vstart_runner.py removes
"sudo" from ceph-fuse command arguments of before execution).

The error message -

DEBUG:__main__:"sudo" was omitted from the following cmd args before execution and logging using function overriding; check vstart_runner.py for more details.
DEBUG:__main__:> sudo ./bin/ceph-fuse /tmp/tmp8o4s_6md/mnt.0 --id 0 --client_mountpoint=/ --client_die_on_failed_dentry_invalidate=false

Signed-off-by: Rishabh Dave <ridave@redhat.com>