Update git submodules
* Update glance-specs from branch 'master' to 5b14f26d108f03ccbd8fc0b3b2026074de09008c - Merge "[Spec Lite] Deprecate cachemanage middleware" - [Spec Lite] Deprecate cachemanage middleware Change-Id: I8fca98a3a4034d08e0ec131860c7efc4dad2137b
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