DT-6282 new jkl zones

[sharhio]

• New area data for jyväskylä
• Case independent zone field search

[vesameskanen]

Green coding: change zone key in data to 'Zone', instead of searching and lowercase mapping feature property keys in runtime again and again, everytime a user somewhere clicks a journey planner map. This will save millions of code iterations every month.

[sharhio]

Green coding: change zone key in data to 'Zone', instead of searching and lowercase mapping feature property keys in runtime again and again, everytime a user somewhere clicks a journey planner map. This will save millions of code iterations every month.

Good point. This one was done out of frustration with the zones mysteriously not working. Will deal with it in some other way.