check that there always exists "admin" as "game master"

[timflutre]

At the very beginning of the appli, it should check that a player named "test" with the "tester" status exists. I will modify the setup.Rmd accordingly so that the data.zip it generates always has a "test" breeder inside.

[juliendiot42]

Would it not be better to check that there always exists "admin" with "game master" status than a tester ?

[timflutre]

@juliendiot42 no because the "tester" player doesn't require any password and one shouldn't use an empty password for the "game master" player as default (bad security!).

[timflutre]

As discussed with Julien, indeed he is right, the game should check that there always exist a player named "admin" with the status of "game master".

[timflutre]

Done in commit ea22dd5.