Add a folder for 'Classloading' training. Add information about 'classloader task'

Signed-off-by: Andrei-Khadziukou <Andrei_Khadziukou@epam.com>
Merge branch 'master' of github.com:Andrei-Khadziukou/AndreiKhadziukouGroup1
Task for the 'Memory management' topic

Signed-off-by: Andrei-Khadziukou <Andrei_Khadziukou@epam.com>