[TEST] (Yet) more Java8 JRE tweaks

Author: polyfractal

travis/download_and_run_es.sh

@@ -17,11 +17,16 @@ else
 fi
 
 echo "Switching to Oracle JDK8 ($ORACLEJDK8_UJA_ALIAS), JAVA_HOME will be set to $ORACLEJDK8_JAVA_HOME"
-update-java-alternatives --set "$ORACLEJDK8_UJA_ALIAS"
 export JAVA_HOME="$ORACLEJDK8_JAVA_HOME"
 
 java -version
 
+/usr/lib/jvm/java-8-oracle/jre/bin/java -version
+
+jdk_switcher use oraclejdk8
+
+java -version
+
 echo "Downloading Elasticsearch v${ES_VERSION}-SNAPSHOT..."
 
 ES_URL=$(curl -sS "https://esvm-props.kibana.rocks/builds" | jq -r ".branches[\"$ES_VERSION\"].zip")