CLMSUPPORT-133 - jaxb:jsr173_api:1.0  license reported as Not Declared

https://issues.sonatype.org/browse/CLMSUPPORT-133
http://bamboo.s/browse/NX-OSSF259-1
http://policy.s/assets/index.html#/reports/nexus-2-10/4dd9f8fed9aa47609a94aa9c446a15c0

This showed up in recent Nexus CLM scans(all versions) as a red flag due to its missing licensing information; I have been unable to ascertain that the license was for this very old release, but presently it lists an Oracle license.
This jar is pulled in by the org.sonatype.sisu.jacksbee:jacksbee-runtime:1.3 dependency, and represents xml handling files that were moved direclty into the runtime in Java 1.6.
The build appears fine with this dependency excluded, so unless anyone sees a reason why not this seems to be the most efficient way to remove any licensing ambiguity from the product.

This exclusion should really go in `buildsupport/rest/pom.xml`