update to MockVertex to match Pipes update.
update to MockVertex to match Pipes update.

tingletech/rexster-tomcat,alszeb/rexster,tomgullo/rexster,tomgullo/rexster,alszeb/rexster,alszeb/rexster,tingletech/rexster-tomcat,tomgullo/rexster,tingletech/rexster-tomcat,tomgullo/rexster,alszeb/rexster