[CI] Temporarly fix adoptopenjdk8 failure

Summary:
This is a workaround for the adoptopenjdk8 issue:
adoptium/infrastructure#1399

It should help keeping the CI running until this is fixed upstream.
The real solution would be to update to latest Teamcity, which will cut
the dependency to the old Java 8 version.

Test Plan: Run any CI build.

Reviewers: #bitcoin_abc, jasonbcox

Reviewed By: #bitcoin_abc, jasonbcox

Differential Revision: https://reviews.bitcoinabc.org/D6635

contrib/teamcity/install_openjdk8.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+export LC_ALL=C.UTF-8
+
+set -euxo pipefail
+
+ADOPTOPENJDK_APT_REPOSITORY=https://adoptopenjdk.jfrog.io/adoptopenjdk/deb
+ADOPTOPENJDK8_DEB_FILE=adoptopenjdk-8-hotspot_8u252-b09-2_amd64.deb
+
+ADOPTOPENJDK8_DEPENDENCIES=(
+  java-common
+  libasound2
+  libc6
+  libx11-6
+  libxext6
+  libxi6
+  libxrender1
+  libxtst6
+  zlib1g
+)
+
+function join_by() {
+  local IFS="$1"
+  shift
+  echo "$*"
+}
+
+# First install the known dependencies
+apt-get update
+DEBIAN_FRONTEND=noninteractive apt-get install -y $(join_by ' ' "${ADOPTOPENJDK8_DEPENDENCIES[@]}")
+
+apt-key add "$(dirname $0)/adoptopenjdk.pub"
+
+{
+  # Try to install from the repo
+  add-apt-repository --yes "${ADOPTOPENJDK_APT_REPOSITORY}" &&
+  apt-get update &&
+  DEBIAN_FRONTEND=noninteractive apt-get install -y adoptopenjdk-8-hotspot
+} || {
+  # Fallback in case of failure:
+  #  - Remove the faulty repo, make sure we can update the packages
+  #  - Download the deb package and install it using dpkg
+  add-apt-repository -r "${ADOPTOPENJDK_APT_REPOSITORY}" &&
+  apt-get update &&
+  wget "${ADOPTOPENJDK_APT_REPOSITORY}/pool/main/a/adoptopenjdk-8-hotspot/${ADOPTOPENJDK8_DEB_FILE}" &&
+  dpkg -i "${ADOPTOPENJDK8_DEB_FILE}"
+} || {
+  # Nothing worked, give up
+  echo "Unable to install adoptopenjdk8, giving up"
+  exit 1
+}
+
+ln -s /usr/lib/jvm/adoptopenjdk-8-hotspot-amd64 /usr/lib/jvm/default-java
+echo 'JAVA_HOME="/usr/lib/jvm/default-java"' >> /etc/environment

contrib/teamcity/setup-debian-buster.sh

@@ -79,14 +79,9 @@ DEBIAN_FRONTEND=noninteractive apt-get install -y $(join_by ' ' "${PACKAGES[@]}"
 
 TEAMCITY_DIR=$(dirname "$0")
 
-# Add the AdoptOpenJDK repo
-apt-key add "${TEAMCITY_DIR}"/adoptopenjdk.pub
-add-apt-repository --yes https://adoptopenjdk.jfrog.io/adoptopenjdk/deb/
-apt-get update
-DEBIAN_FRONTEND=noninteractive apt-get install -y adoptopenjdk-8-hotspot
-
-ln -s /usr/lib/jvm/adoptopenjdk-8-hotspot-amd64 /usr/lib/jvm/default-java
-echo 'JAVA_HOME="/usr/lib/jvm/default-java"' >> /etc/environment
+# FIXME this should no longer be needed starting with Teamcity 2020.1, which
+# supports Java 11.
+"${TEAMCITY_DIR}/install_openjdk8.sh"
 
 # Install llvm-8 and clang-10
 apt-key add "${TEAMCITY_DIR}"/llvm.pub