Multiple divisions support with new mobile API

[axel3rd]

With new MPG APIs from mobile app usage (#191), the multiple division support (#129) was removed ; because APIs have completely change and I haven't this MPG use case.

Some data for unit tests are necessary (see here).

At minimum, the /dashboard/leagues content, like explained in Get MPG data for opening a bug.

[axel3rd]

FI, it was managed like that:

mpg-coach-bot/src/main/java/org/blondin/mpg/Main.java

Lines 72 to 77 in 30b1671

	static void process(ApiClients apiClients, Config config) {
	for (League leagueOptionalMaster : apiClients.getMpg().getDashboard().getLeagues()) {
	League league = leagueOptionalMaster;
	if (league.isMasterLeague()) {
	league = league.getSubLeague();
	}