Update git submodules
* Update openstack-ansible-os_nova from branch 'master' to f7858e9440d515ba5d5a3beb4496e24c55c19d25 - Merge "Set default qemu settings for RBD" - Set default qemu settings for RBD When Nova and/or Cinder are using Ceph as backend, qemu will need to open a connection and two threads for each and every Ceph OSD. Since all connections occur in the same qemu process, this may result in hitting default max open files limit. Thus in case of more then 10 volumes are attached to the same instance and are used actively can end up in blocked IO operations inside VMs. We increase these limits by default when RBD backend is used. Change-Id: Ib3081280cdbae1eb2235083c95c27e2efd0b413e
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Subproject commit 0870a01a6aade00bebb91e26299f46cb145790de
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Subproject commit f7858e9440d515ba5d5a3beb4496e24c55c19d25
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