use openjdk instead of oraclejdk to build

Artem Labazin · Artem Labazin · commit b1b00a52eb5c · 2019-05-30T15:27:18.000+03:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,7 @@
 language: java
 
 jdk:
-  - oraclejdk8
+  - openjdk8
 
 install:
   ./mvnw --settings .settings.xml install -DskipTests=true -Dmaven.javadoc.skip=true -Dgpg.skip -B -V
