Hello smart folks!

The Org linter warns about *correct* Java source block arguments.  The
attached patch fixes that.

P.S. I originally had two regression tests, not one.  The other test
checked the '#+property:' version, e.g.

#+property: header-args:java+ :dir /tmp
#+property: header-args:java+ :classname com.example.Example
#+property: header-args:java+ :imports com.example.OtherExample
#+property: header-args:java+ :cmpflag -classpath .:/tmp/example/
#+property: header-args:java+ :cmdline -classpath .:/tmp/example/
#+property: header-args:java+ :cmdarg -verbose

However, the linter rejects these as unknown header arguments.  From
what I understand, that look like a separate issue.

Rudy