* GlaxoSmithKline sees first vaccine doses ready this year * J&J and GSK executives discuss Ebola vaccine collaboration * J&J investing up to $200 mln to accelerate program * Bavarian Nordic to receive cash injection from J&J (Adds comments from GSK's chief executive) By Ben Hirschler LONDON, Oct 22 (Reuters) - Leading drugmakers plan to work together to speed up the development of an Ebola vaccine and hope to produce millions of doses for use next year.