ScriptEditorTestDrive: default to Beanshell

It is pretty annoying if you're testing the script editor and have to
select a script language every *single* time you restart, especially on
MacOSX where the "Alt+L B" shortcut does not work as everywhere else.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
TO-UNDO: Bump the SciJava common version temporarily

... needed to make the error output work...

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>