Try regular environment

Author: akarnokd

.travis.yml

@@ -1,7 +1,7 @@
 language: java
 sudo: required
-dist: trusty
-group: edge
+#dist: trusty
+#group: edge
 
 script:
   - ./gradlew check
@@ -14,7 +14,7 @@ before_install:
 
 matrix:
   include:
-    - jdk: oraclejdk7 # openjdk6 and openjdk7 fails for some reason
+    - jdk: openjdk6
     - jdk: oraclejdk8 # JDK 1.8.0_131-b11
     - jdk: oraclejdk9 # JDK 9-ea+174 provided by Travis will be replaced by 9+177 in "before_install"
       before_install: