Set Java to 8 and Maven to 3.9.6

Author: injectives

testkit/Dockerfile

@@ -1,6 +1,6 @@
 FROM debian:bullseye-slim
 
-ENV JAVA_HOME=/usr/lib/jvm/openjdk-17 \
+ENV JAVA_HOME=/usr/lib/jvm/openjdk-8 \
     PYTHON=python3
 
 RUN apt-get update && apt-get install -y \
@@ -12,9 +12,9 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # https://hub.docker.com/_/eclipse-temurin
-COPY --from=eclipse-temurin:17-jdk /opt/java/openjdk $JAVA_HOME
+COPY --from=eclipse-temurin:8-jdk /opt/java/openjdk $JAVA_HOME
 
-COPY --from=maven:3.9.2-eclipse-temurin-17 /usr/share/maven /opt/apache-maven
+COPY --from=maven:3.9.6-eclipse-temurin-8 /usr/share/maven /opt/apache-maven
 
 # Install our own CAs on the image.
 # Assumes Linux Debian based image.
@@ -27,6 +27,6 @@ RUN echo 'jdk.tls.disabledAlgorithms=jdk.tls.disabledAlgorithms=SSLv3, TLSv1, RC
 # https://github.com/adoptium/containers/pull/392
 # https://github.com/adoptium/containers/blob/f6d4923380ecb1ec4b0d58c633ebb0aeed4c8332/17/jdk/ubuntu/jammy/entrypoint.sh#L23
 RUN update-ca-certificates \
-    && trust extract --overwrite --format=java-cacerts --filter=ca-anchors --purpose=server-auth "$JAVA_HOME/lib/security/cacerts"
+    && trust extract --overwrite --format=java-cacerts --filter=ca-anchors --purpose=server-auth "$JAVA_HOME/jre/lib/security/cacerts"
 
 ENV PATH=$JAVA_HOME/bin:/opt/apache-maven/bin:$PATH