Embedded testing and data files

[Dain Sundstrom]

Should we default hsqldb and activemq to in-memory only when in  
embedded testing mode?  Right now, when we execute a test, we get  
hsql and activemq data files in the directory where the process was  
started, which I find really annoying.

Anyway, what do you think?  Also, if anyone knows how to actually  
implement this idea, that would also be helpful :)

-dain