...to match style used for other data members.

...they contained no class files anymore, due to missing gb_Jar_set_packageroot
calls.  However, those calls only work for subdirectories, i.e., the example
.java files need to be put into a package (I chose
org.libreoffice.example.java_scripts) for all of them).  This in turn required
adaption of the parcel-descriptor.xml files; not sure what the logicalname
entries there are good for if anything -- the macro names at "Tools - Macros -
Run Macro..." now unfortunately(?) contain the fully qualified paths for the
HelloWorld, HighlightText, and MemoryUpdate examples.  There are additional
examples at scripting/examples/java/ that apparently do not get packaged (but I
adapted them anyway).

ScriptMetaData.createURL produces weird URLs (ending in "/ucb/", and potentially
still containing vnd.sun.star.expand: prefix) that are apparently good for
loading documents for editing via UCBStreamHandler, but cannot meaningfully be
passed to a URLClassLoader.

It is unclear to me how the Java script provider shall ever have found the
script jars in the past.