[Build] Update jdk home

Author: mpkorstanje

.m2/travis-ci-toolchains.xml

@@ -7,7 +7,7 @@
             <vendor>openjdk</vendor>
         </provides>
         <configuration>
-            <jdkHome>/usr/local/lib/jvm/openjdk8</jdkHome>
+            <jdkHome>/usr/lib/jvm/java-1.8.0-openjdk-amd64</jdkHome>
         </configuration>
     </toolchain>
 </toolchains>