Update git submodules
* Update oslo.rootwrap from branch 'master' - Update reno for stable/queens Change-Id: I7b7c17a695244524b04d49964c510f0c1a846eef
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* Update oslo.rootwrap from branch 'master' - Update reno for stable/queens Change-Id: I7b7c17a695244524b04d49964c510f0c1a846eef