Open Redirect security issues

[RIPS] found 3 Open Redirect issues in the following files of OpenNMS 25.1.2:

AcknowledgeAlarmController
https://github.com/OpenNMS/opennms/blob/master/opennms-webapp/src/main/java/org/opennms/web/controller/alarm/AcknowledgeAlarmController.java
AcknowledgeNotificationController
https://github.com/OpenNMS/opennms/blob/master/opennms-webapp/src/main/java/org/opennms/web/controller/notification/AcknowledgeNotificationController.java
AcknowledgeAlarmByFilterController
https://github.com/OpenNMS/opennms/blob/master/opennms-webapp/src/main/java/org/opennms/web/controller/alarm/AcknowledgeAlarmByFilterController.java

The first issue can be exploited via the GET parameter `redirect` by accessing the following URL:
`http://192.168.56.102:8980/opennms/alarm/acknowledge?redirect=http://google.com&actionCode=unack&alarm=1`

The second issue can be exploited via the GET parameter `redirect` by accessing the following URL:
`192.168.56.102:8980/opennms/notification/acknowledge?redirect=http://google.com&notices=1`

The third issue can be exploited via the GET parameter `redirect` by accessing the following URL:
`http://192.168.56.102:8980/opennms/alarm/acknowledgeByFilter?redirect=http://google.com&actionCode=unack`

For more information about fixing an OpenRedirect see:

https://owasp.org/www-project-cheat-sheets/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html