try to fix travis builds that fail after the pull request is accepted
diff --git a/service/build.gradle b/service/build.gradle
index b30cd09..c21f785 100644
--- a/service/build.gradle
+++ b/service/build.gradle
@@ -20,6 +20,7 @@
         springBootVersion = '1.4.1.RELEASE'
     }
     repositories {
+        mavenLocal()
         jcenter()
     }
 }