put libvirt debug in the right place

libvirt debug setting was happening in a place where we weren't
actually resetting the daemon. Move it to into the hypervisor
plugin where we do.

Change-Id: Ia79b0ef50f6b8fb007a20ce5cb4e510a5e4600a5
diff --git a/lib/nova_plugins/hypervisor-libvirt b/lib/nova_plugins/hypervisor-libvirt
index bbf6554..26880e5 100644
--- a/lib/nova_plugins/hypervisor-libvirt
+++ b/lib/nova_plugins/hypervisor-libvirt
@@ -103,6 +103,16 @@
     fi
     add_user_to_group $STACK_USER $LIBVIRT_GROUP
 
+    # Enable server side traces for libvirtd
+    local log_filters="1:libvirt 1:qemu 1:conf 1:security 3:event 3:json 3:file 1:util"
+    local log_outputs="1:file:/var/log/libvirt/libvirtd.log"
+    if ! grep -q "log_filters=\"$log_filters\"" /etc/libvirt/libvirtd.conf; then
+        echo "log_filters=\"$log_filters\"" | sudo tee -a /etc/libvirt/libvirtd.conf
+    fi
+    if ! grep -q "log_outputs=\"$log_outputs\"" /etc/libvirt/libvirtd.conf; then
+        echo "log_outputs=\"$log_outputs\"" | sudo tee -a /etc/libvirt/libvirtd.conf
+    fi
+
     # libvirt detects various settings on startup, as we potentially changed
     # the system configuration (modules, filesystems), we need to restart
     # libvirt to detect those changes.