Bumping to Houdini Version: 13.0.520
Houdini Engine Version: 1.8 (API: 15)
Simply playFromCache attribute instead of making a connection
Connect time to fluidShape

This fixes problem where fluidShape isn't updating when using Maya
batch.
Revert "HAPI: Maya: Simply playFromCache attribute instead of making a connection"

The fluidShape.playFromCache actually needs to be a connection, because
the attribute is not saved to the scene file.