As the subject says, we've branched today to ovirt-engine-4.2 branch, every change that is required for 4.2.2 and onward should be backported to this branch.
Note that we chose now so there will be no confusion on whether your patches are included, if your patch got merge in master before 21:45 IST (20:45 CET) then no backport is needed.
Please note that though we branched out the main focus should still be 4.2.2.