nova: remove explicit file injection being disabled

Change 9ce99a44cf85e431227536e2251ef05b52e61524 disabled file
injection with the libvirt driver by default back in Icehouse,
so devstack doesn't need to do this explicitly anymore.

Change-Id: Id0c521f6f624367bd497463c8c2d99488548fcff

Author: Matt Riedemann

lib/ceph

@@ -301,7 +301,6 @@ function configure_ceph_nova {
     iniset $NOVA_CONF libvirt rbd_user ${CINDER_CEPH_USER}
     iniset $NOVA_CONF libvirt rbd_secret_uuid ${CINDER_CEPH_UUID}
     iniset $NOVA_CONF libvirt inject_key false
-    iniset $NOVA_CONF libvirt inject_partition -2
     iniset $NOVA_CONF libvirt disk_cachemodes "network=writeback"
     iniset $NOVA_CONF libvirt images_type rbd
     iniset $NOVA_CONF libvirt images_rbd_pool ${NOVA_CEPH_POOL}

lib/nova_plugins/hypervisor-libvirt

@@ -57,10 +57,6 @@ function configure_nova_hypervisor {
         iniset $NOVA_CONF vnc enabled "false"
     fi
 
-    # File injection is being disabled by default in the near future -
-    # disable it here for now to avoid surprises later.
-    iniset $NOVA_CONF libvirt inject_partition '-2'
-
     if [[ "$LIBVIRT_TYPE" = "parallels" ]]; then
         iniset $NOVA_CONF libvirt connection_uri "parallels+unix:///system"
         iniset $NOVA_CONF libvirt images_type "ploop"