racer_edit_page
Now we have dropdown list on "Change numbers modal" with disabled that
numbers, that exist in this car class.
I change String to ArrayList of numbers, please check.
Deleted all unused code.
Changed ArrayList to List
remove racer controller
add RacerController
Merge branch 'mgalctc_editracer_dropdown'

Conflicts:
	src/main/java/net/carting/web/RacerController.java
resolving conflicts
resolving conflict
resolving conflicts