pom.xml: update to killbill-oss-parent 0.140.25
pom.xml: update to killbill-oss-parent 0.140.25

Signed-off-by: Pierre-Alexandre Meyer <ff019a5748a52b5641624af88a54a2f0e46a9fb5@mouraf.org>

killbill/killbill-email-notifications-plugin,killbill/killbill-email-notifications-plugin