chore(maven): change to release-parent v2.5
chore(maven): change to release-parent v2.5

related to #CAM-2727

TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,nagyistoce/camunda-cockpit-ui,TitanUser/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,nagyistoce/camunda-cockpit-ui,tcrossland/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,xlinur/camunda-bpm-webapp