IGNITE-9348: ML examples improvements
IGNITE-9348: ML examples improvements

this closes #4662

xtern/ignite,SomeFire/ignite,amirakhmedov/ignite,BiryukovVA/ignite,NSAmelchev/ignite,ptupitsyn/ignite,daradurvs/ignite,samaitra/ignite,apache/ignite,ptupitsyn/ignite,chandresh-pancholi/ignite,xtern/ignite,shroman/ignite,shroman/ignite,apache/ignite,ptupitsyn/ignite,samaitra/ignite,ascherbakoff/ignite,NSAmelchev/ignite,andrey-kuznetsov/ignite,samaitra/ignite,daradurvs/ignite,apache/ignite,ilantukh/ignite,apache/ignite,ascherbakoff/ignite,chandresh-pancholi/ignite,ascherbakoff/ignite,NSAmelchev/ignite,ilantukh/ignite,chandresh-pancholi/ignite,NSAmelchev/ignite,daradurvs/ignite,BiryukovVA/ignite,daradurvs/ignite,xtern/ignite,samaitra/ignite,shroman/ignite,NSAmelchev/ignite,xtern/ignite,nizhikov/ignite,apache/ignite,SomeFire/ignite,nizhikov/ignite,andrey-kuznetsov/ignite,nizhikov/ignite,shroman/ignite,amirakhmedov/ignite,xtern/ignite,apache/ignite,nizhikov/ignite,samaitra/ignite,shroman/ignite,ilantukh/ignite,BiryukovVA/ignite,samaitra/ignite,ilantukh/ignite,NSAmelchev/ignite,ascherbakoff/ignite,daradurvs/ignite,samaitra/ignite,amirakhmedov/ignite,xtern/ignite,ascherbakoff/ignite,andrey-kuznetsov/ignite,daradurvs/ignite,amirakhmedov/ignite,ilantukh/ignite,chandresh-pancholi/ignite,ilantukh/ignite,andrey-kuznetsov/ignite,xtern/ignite,nizhikov/ignite,daradurvs/ignite,ascherbakoff/ignite,samaitra/ignite,andrey-kuznetsov/ignite,nizhikov/ignite,xtern/ignite,andrey-kuznetsov/ignite,apache/ignite,BiryukovVA/ignite,ptupitsyn/ignite,samaitra/ignite,chandresh-pancholi/ignite,SomeFire/ignite,SomeFire/ignite,BiryukovVA/ignite,ascherbakoff/ignite,andrey-kuznetsov/ignite,BiryukovVA/ignite,daradurvs/ignite,SomeFire/ignite,chandresh-pancholi/ignite,nizhikov/ignite,BiryukovVA/ignite,ptupitsyn/ignite,shroman/ignite,ptupitsyn/ignite,amirakhmedov/ignite,ptupitsyn/ignite,BiryukovVA/ignite,amirakhmedov/ignite,ilantukh/ignite,amirakhmedov/ignite,SomeFire/ignite,daradurvs/ignite,ilantukh/ignite,andrey-kuznetsov/ignite,NSAmelchev/ignite,daradurvs/ignite,andrey-kuznetsov/ignite,andrey-kuznetsov/ignite,SomeFire/ignite,BiryukovVA/ignite,ptupitsyn/ignite,chandresh-pancholi/ignite,shroman/ignite,ascherbakoff/ignite,chandresh-pancholi/ignite,amirakhmedov/ignite,SomeFire/ignite,shroman/ignite,ptupitsyn/ignite,SomeFire/ignite,SomeFire/ignite,amirakhmedov/ignite,samaitra/ignite,apache/ignite,nizhikov/ignite,BiryukovVA/ignite,ascherbakoff/ignite,shroman/ignite,NSAmelchev/ignite,chandresh-pancholi/ignite,ilantukh/ignite,shroman/ignite,NSAmelchev/ignite,ptupitsyn/ignite,ilantukh/ignite,apache/ignite,nizhikov/ignite,xtern/ignite