DATACASS-370 - Use newer Java 8 on Travis CI.

.travis.yml

@@ -1,6 +1,8 @@
 language: java
+
 jdk:
   - oraclejdk8
+
 env:
   matrix:
     - PROFILE=ci
@@ -24,12 +26,22 @@ env:
     - PROFILE=external-cassandra CASSANDRA_VERSION=3.7
     - PROFILE=external-cassandra CASSANDRA_VERSION=3.8
     - PROFILE=external-cassandra CASSANDRA_VERSION=3.9
+
+addons:
+  apt:
+    packages:
+    - oracle-java8-installer
+
 cache:
   directories:
     - $HOME/.m2
     - 'download'
+
 sudo: false
+
 before_install:
   - sed -i.bak -e 's|https://nexus.codehaus.org/snapshots/|https://oss.sonatype.org/content/repositories/codehaus-snapshots/|g' ~/.m2/settings.xml
+
 install: if [ ! -z ${CASSANDRA_VERSION} ]; then ./setup-cassandra.sh; fi;
+
 script: mvn clean install -P${PROFILE} -Dcassandra-driver.version=${CASSANDRA_DRIVER_VERSION:-3.1.1} -Dmaven.javadoc.skip=true