Fixed "Error installing ‘oraclejdk8'"

Author: jaaufauvre

.travis.yml

@@ -1,4 +1,5 @@
 language: java
+dist: trusty
 git:
   depth: false  # "Shallow clone detected during the analysis"
 matrix:
@@ -25,4 +26,4 @@ after_success:
         "-Dsonar.host.url=$SONAR_URL" \
         "-Dsonar.login=$SONAR_TOKEN" \
         "-Dsonar.cpd.exclusions=**/OkHttp*.java" \
-        "-Dsonar.exclusions=**/*.xml" || echo 'Skipping Sonar execution'
+        "-Dsonar.exclusions=**/*.xml" || echo 'Skipping Sonar execution'