Virtual Instruments, which was acquired six months ago by Load Dynamix, has acquired another San Jose-based startup. This time it is buying Xangati, a developer of hybrid cloud and virtualization performance management. Terms of the deal were not disclosed but it is reportedly an all-stock transaction. Xangati has raised about $22 million since it was founded in 2006, doing its last round of funding three years ago. Its investors include HighBar Partners, which also invested about $20 million...