Update git submodules
* Update keystonemiddleware from branch 'master' - Merge "Update reno for stable/queens" - Update reno for stable/queens Change-Id: I5727e441a8e4ebae506e30abaee792bb2c040614
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* Update keystonemiddleware from branch 'master' - Merge "Update reno for stable/queens" - Update reno for stable/queens Change-Id: I5727e441a8e4ebae506e30abaee792bb2c040614