by laws: remove the necessity for the OMC to invite committers and OTC members.

by laws: remove the necessity for the OMC to invite committers and OTC members.

It would be better if these invitations come from the OTC which does the
nominations.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Mark J. Cox <mark@awe.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/207)