fix: switch to java 25

Signed-off-by: Paul Bastide <pbastide@us.ibm.com>

Author: prb112

rhcl/mockserver/Containerfile

@@ -5,7 +5,7 @@ ARG user=fedora
 
 # Install dependencies using microdnf (standard for fedora-minimal)
 RUN microdnf -y update \
-    && microdnf install -y java-17-openjdk-headless openssl shadow-utils \
+    && microdnf install -y java-25-openjdk-headless.ppc64le openssl shadow-utils \
     && microdnf clean all
 
 # Create the user and set up environment