Fix build failures with openjdk-21

Upstream commits abe2d568d02759d29ba366556732459a43c16c87(see [1]) and 44727a99c343f04819093128dbca0a27f9619bbc (see [2]) end up changing the parent POM to point to org.jboss.logging:logging-parent 1.0.2.Final. The first commit fixes a build failure with openjdk-21. In the Debian package, including these two commits means bringing in new maven dependencies. So, this commit pulls out the relevant part of upstream fixes that actually solves the FTBFS issue with openjdk-21.

We essentially use the openjdk-11 classes API. The commits also make openjdk-11 as the minimum JDK level. This could be an interim solution until a future upstream release and the Debian package updating to it.

[1] https://github.com/jboss-logging/jboss-logging-tools/commit/abe2d568d02759d29ba366556732459a43c16c87 [2] https://github.com/jboss-logging/jboss-logging-tools/commit/44727a99c343f04819093128dbca0a27f9619bbc