Overriding default velocity templates

[George Fletcher]

Hi,

I'm looking for a way to override the default velocity templates used to 
generate java sources from IDL files. I know that I can do this by 
passing a command like argument to override 
'org.apache.avro.specific.templates' but that doesn't work well with our 
build process. We want a standard set of templates used by many developers.

What is the best way to override the system property? It appears from 
the avro code that while the SpecificCompiler.java supports a 
setTemplateDir() method, nothing in the avro-maven-plugin calls this method.

Thanks,
George