clazz: Clean up Clazz
clazz: Clean up Clazz

We make sure to call classStart before other methods on
ClassDataCollector so we can avoid work if the collector is not
interested in the class.

Signed-off-by: BJ Hargrave <3d26bb3930946e3370762d769a073cece444c2d8@bjhargrave.com>

psoreide/bnd,psoreide/bnd,psoreide/bnd