qa/rgw/sts: keycloak task installs java manually

java had already been installed automatically before centos 9. add an
override to install the jdk-17 packages manually

Fixes: https://tracker.ceph.com/issues/62536

Signed-off-by: Casey Bodley <cbodley@redhat.com>

qa/suites/rgw/sts/tasks/1-keycloak.yaml

@@ -3,3 +3,12 @@ tasks:
 - keycloak:
     client.0:
       keycloak_version: 11.0.0
+
+overrides:
+  install:
+    ceph:
+      extra_system_packages:
+        rpm:
+        - java-17-openjdk-headless
+        deb:
+        - openjdk-17-jdk-headless