Comment 42 for bug 1455489

Changes abandoned for 6.1 and 7.0 because this patch would block mcollective identity updates on 6.1 and 7.0 just because that functionaly thoroughly relies on the 2 patches which were merged into 8.0 https://bugs.launchpad.net/fuel/+bug/1518306
Also due to rare reproducibility and huge difficulty of making the patch we're going to close the bug for 6.1 and 7.0 as Won't Fix.