Provide java9 system bundle exports for jpms jre

Until now, the framework needed to be aware of the java version it was running on to determine the system bundle exports (and capabilities). In other words, a new java version required a new framework release with updated default properties.

As it currently looks as if java versions will be released much more often in the future we should at a minimum make it so that we fall back to the current java9 definitions when on jpms.