[rfc][icedtea-web] make jnlpfile (nearly) mandatory argument of message and adapt various redclarations accordingly

[Andrew Azores]

On 04/06/15 02:47 AM, Jiri Vanek wrote:
> * jnlpfile is used in most dialogues anyway
> * adding it to extras was already in current state bogus
> * all things, logic (already implemented) which rememberable solution 
> is using, are already using jnlpfile as provider of identification
>   * so also rememberable solution needs it
>
>
> J.

+1 looks good to me.

Thanks,

Andrew A