[xbase] ImportOrganizer throws StringIndexOutOfBoundsException
https://bugs.eclipse.org/bugs/show_bug.cgi?id=448728

Change-Id: I35cd850d521bad124838e904f02725febf40ff2f
[xbase][typesystem] Fixed IAE with var arg methods invoked as extension

see https://bugs.eclipse.org/bugs/show_bug.cgi?id=450354

Change-Id: Icacd4bb8a0891ee6ccd9863e35e356d7339b44de
Merge "[xbase] ImportOrganizer throws StringIndexOutOfBoundsException https://bugs.eclipse.org/bugs/show_bug.cgi?id=448728"
Merge "[xbase][typesystem] Fixed IAE with var arg methods invoked as extension"