pybind/ceph_argparse.py:'timeout' must in kwargs when call run_in_thread

pybind/ceph_argparse.py:'timeout' must in kwargs when call run_in_thread

timeout is ignored by C API， but is useful in python threads.
Function "run_in_thread" get "timeout" from kwargs，but other functions passing
"timeout" in args, so "timeout" is 0 forever in run_in_thread.
It will be polling forever when cluster unhealthy until recv signal like ctrl+c or cluster become healthy.
So pass 'timeout' like 'timeout=timeout'

Signed-off-by: yangdeliu <yangdeliu@szsandstone.com>