Upgrade CI container images to Ubuntu Focal

ci/images/setup.sh

@@ -5,8 +5,11 @@ set -ex
 # UTILS
 ###########################################################
 
+export DEBIAN_FRONTEND=noninteractive
 apt-get update
-apt-get install --no-install-recommends -y ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq fontconfig
+apt-get install --no-install-recommends -y tzdata ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq fontconfig
+ln -fs /usr/share/zoneinfo/UTC /etc/localtime
+dpkg-reconfigure --frontend noninteractive tzdata
 rm -rf /var/lib/apt/lists/*
 
 curl https://raw.githubusercontent.com/spring-io/concourse-java-scripts/v0.0.3/concourse-java.sh > /opt/concourse-java.sh

ci/images/spring-framework-ci-image/Dockerfile

-FROM ubuntu:bionic-20200713
+FROM ubuntu:focal-20201106
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh

ci/images/spring-framework-jdk11-ci-image/Dockerfile

-FROM ubuntu:bionic-20200713
+FROM ubuntu:focal-20201106
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh

ci/images/spring-framework-jdk14-ci-image/Dockerfile

-FROM ubuntu:bionic-20200713
+FROM ubuntu:focal-20201106
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh

ci/images/spring-framework-jdk15-ci-image/Dockerfile

-FROM ubuntu:bionic-20200713
+FROM ubuntu:focal-20201106
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh