Sync with Oslo-Incubator

oslo-incubator HEAD was 2eab986ef3c43f8d1e25065e3cbc1307860c25c7

This change brings in a few minor updates to python3 and a bug fix
for deep copy failure in gettextutils.

Change-Id: Id360f3b43d1ad2f67b328206990dd6bdb53c1cd7
Merge "Sync with Oslo-Incubator"