Fix XenAPINFS configuration

fixes bug 1087272

Trying to configure XenAPINFS volume driver through localrc options
failed. This fix removes the extra check, as lib/cinder already exits on
error.

Change-Id: I874b7cee44861244cb7a340cc4094ef3f8b48a5a
diff --git a/lib/cinder b/lib/cinder
index ce160bf..d47c83a 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -159,7 +159,6 @@
             iniset $CINDER_CONF DEFAULT xenapi_nfs_server "$CINDER_XENAPI_NFS_SERVER"
             iniset $CINDER_CONF DEFAULT xenapi_nfs_serverpath "$CINDER_XENAPI_NFS_SERVERPATH"
         )
-        [ $? -ne 0 ] && exit 1
     fi
 }