Update git submodules
* Update cinder-specs from branch 'master'
- Merge "Fix pygments style"
- Fix pygments style
New theme of docs (Victoria+) respects pygments_style.
Since we starts using Victoria reqs while being on Ussuri,
this patch ensures proper rendering both in Ussuri and Victoria.
Change-Id: I0d54db1b5967a226c5fc885aec4e170eee1dad6c
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