Remove volume_pool_size cinder.conf configuration option

The correct configuration option is pool_size, however this is only used when
using a volume_driver of cinder.volume.drivers.lvm.ThinLVMVolumeDriver, which
we don't support.  We can re-add pool_size if we do decide to support
cinder.volume.drivers.lvm.ThinLVMVolumeDriver.
Merge pull request #75 from mattt416/remove_pool_size_config_option

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add RBD support
Merge pull request #77 from mancdaz/master

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Don't use "log" resource in conf provider

It always updates the LWR and restarts cinder services.  Fixes #566
Merge pull request #78 from invsblduck/de285_cinder

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removing restore-selinux-context git issue 577
Merge pull request #79 from jrcloud/de294-selinux-context

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Version Bump to 4.1.3