Update git submodules
* Update charm-glance from branch 'master'
to b1cae3160a90e311690d27780de3b5ebfbba7ed9
- Merge "Add impish to metadata.yaml"
- Add impish to metadata.yaml
Change-Id: I077d6f2a11b37b23cae9328475b99dba707636c0
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