ALIROOT-8439 - adding systematic error only after rescaling - keeping  gold interface in ErrY2Z2 - needed by HLT
ALIROOT-8439 - adding systematic error only after rescaling -
keeping  gold interface in ErrY2Z2
- needed by HLT

coppedis/AliRoot,miranov25/AliRoot,miranov25/AliRoot,miranov25/AliRoot,coppedis/AliRoot,coppedis/AliRoot,coppedis/AliRoot,alisw/AliRoot,miranov25/AliRoot,alisw/AliRoot,coppedis/AliRoot,miranov25/AliRoot,alisw/AliRoot,coppedis/AliRoot,coppedis/AliRoot,miranov25/AliRoot,alisw/AliRoot,alisw/AliRoot,alisw/AliRoot,miranov25/AliRoot,alisw/AliRoot,miranov25/AliRoot,alisw/AliRoot,coppedis/AliRoot