fakelibvirt: Use versionutils to set min versions found in the driver

These were previously manually converted ints based on the version
tuples present in the driver. To avoid ever needing to worry about these
again this change simply uses versionutils to covert the tuples found in
the driver into ints used by fakelibvirt.

Change-Id: I864494e11ff697788167c996a39f38d3d833d0d7

Author: lyarwood

nova/tests/unit/virt/libvirt/fakelibvirt.py

@@ -21,11 +21,13 @@
 from lxml import etree
 from oslo_log import log as logging
 from oslo_utils.fixture import uuidsentinel as uuids
+from oslo_utils import versionutils
 
 from nova import conf
 from nova.objects import fields as obj_fields
 from nova.tests.unit.virt.libvirt import fake_libvirt_data
 from nova.virt.libvirt import config as vconfig
+from nova.virt.libvirt import driver as libvirt_driver
 
 
 # Allow passing None to the various connect methods
@@ -182,9 +184,11 @@ def _reset():
 VIR_SECRET_USAGE_TYPE_ISCSI = 3
 
 # Libvirt version to match MIN_LIBVIRT_VERSION in driver.py
-FAKE_LIBVIRT_VERSION = 4000000
-# QEMU version to match MIN_QEMU_VERSION in driver.py
-FAKE_QEMU_VERSION = 2011000
+FAKE_LIBVIRT_VERSION = versionutils.convert_version_to_int(
+    libvirt_driver.MIN_LIBVIRT_VERSION)
+# Libvirt version to match MIN_QEMU_VERSION in driver.py
+FAKE_QEMU_VERSION = versionutils.convert_version_to_int(
+    libvirt_driver.MIN_QEMU_VERSION)
 
 PCI_VEND_ID = '8086'
 PCI_VEND_NAME = 'Intel Corporation'