Update git submodules
* Update nova from branch 'master'
to fa7f717125c62ca8e34ea000fa8835ff744c54ff
- Merge "fup: Mock all unix connectors in os-brick fixture"
- fup: Mock all unix connectors in os-brick fixture
Change-Id: I3a512f25e3a47349c13807dd90864f3a4270764c
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