dependency branches for 1.21

[Horacio Duran]

Hey, I have been backporting licencing fixes into utils, syslog and testing
for 1.21 release. While doing this I noticed that the revs testing and
utils used in 1.21 are quite far from what we use in master so, in order to
prevent bringing unwanted changes to 1.21 by bumping the deps to HEAD I
branched utils and testing at the version they where in 1.21.
Both repos now have a 1.21 branch where all backported changes should go,
if any.
I presume I will be doing the same for 1.22 If I find the case to be the
same.
Cheers.
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