config: Allow dynamic change of token_coefficient

token_coefficient change in cmap didn't triggered change. So only way
how to change token_coefficient was editing config file and reload.

Patch let's key totem.token_coefficient to be processed so
token_coefficient can be dynamically changed.

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>