Conversation propagation token that negates the "cid" parameter

A method that negates the propagation of the cid parameter by the ConversationAwareViewHandler so that a non-transient is not resumed even if there is a cid parameter in the request. Stripping it out on a per-component-basis is tricky.

Suggested implementation: change the last line in WeldPhaseListener.getConversationId to

return facesContext.getExternalContext().getRequestParameterMap().containsKey("nocid") ? null : cid;