4.4.0-103.126) is not available, but a newer one is (4.4.0-142.168). We redirected you there.
/usr/share/java/jibx-schema.jar is in libjibx-java 1.2.3-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/jibx-schema-1.2.3.jar