Set runtime to 'java' to have the pom.xml created (#217)
Set runtime to 'java' to have the pom.xml created (#217)

When the runtime is ['assumed'](https://github.com/fnproject/fn/blob/11b5c4ce673e1524731f064de6ec6300d5b2c49a/cli/init.go#L182-L188) (i.e. not explicitly set to 'java'), the [pom.xml isn't created(https://github.com/fnproject/fn/blob/85ae711447b593b4c5be1247d2090b058fc64011/cli/langs/java.go#L38-L45) 
and [init fail](https://github.com/fnproject/fn/blob/85ae711447b593b4c5be1247d2090b058fc64011/cli/langs/java.go#L99-L101).
fnproject/fn,fnproject/fn,fnproject/fn