fix nova's fake virt driver plugin

nova's config was changed -
now virt driver parameter needs not full path for virt driver

Change-Id: I2a32b4dee3f27efc78bd1e546a96cfbc1225b8b5
diff --git a/lib/nova_plugins/hypervisor-fake b/lib/nova_plugins/hypervisor-fake
index 2434dce..6ac2199 100644
--- a/lib/nova_plugins/hypervisor-fake
+++ b/lib/nova_plugins/hypervisor-fake
@@ -36,7 +36,7 @@
 
 # configure_nova_hypervisor - Set config files, create data dirs, etc
 function configure_nova_hypervisor {
-    iniset $NOVA_CONF DEFAULT compute_driver "nova.virt.fake.FakeDriver"
+    iniset $NOVA_CONF DEFAULT compute_driver "fake.FakeDriver"
     # Disable arbitrary limits
     iniset $NOVA_CONF DEFAULT quota_instances -1
     iniset $NOVA_CONF DEFAULT quota_cores -1