Currently, nova zvm virt driver is in nova namespace. This result
in some troubles when generating config file, generating docs and
packaging.
All changes in this commit are trying to move nova zvm virt driver
code into new namespace - nova_zvm .
Change-Id: I5251069dfd24ff4e337e9308439415482eb2234c
Including all python modules that implements Nova virt driver for
zVM, and configuration files that make the project work with
OpenStack development infrastructure.
Change-Id: I7efe0d1b6ef42268438d4141860fb4c51c09d30c