pom.xml: updates for release 0.51.24
pom.xml: updates for release 0.51.24

Modify getUserRoles signature; to throw SecurityApiException

Signed-off-by: Kill Bill core team <1a73af9e7ae00182733b2292511b814be66f065f@killbill.io>

killbill/killbill-api,killbill/killbill-api