XTCE12 — Add title to parameter

A specific syntactic item for a title associated with telemetry parameters is not available in XTCE. Reported by JPL

Options are available in the current XTCE implementation

The recommended path forward for programs is to map their internal schema to the XTCE schema considering that both short and long descriptions are already available. It is unusual to need a third description and in this case it might be more of an Alias than a description. We recommend using Alias with a @nameSpace of TITLE for capturing this if it cannot be mapped to short or long description. Additional possibilities exist and the committee can answer questions for that if posed in a more specific way.