do our JDK 8 testing on OpenJDK 8

SethTisue · SethTisue · commit 1c3310c8d7c9 · 2019-07-04T20:11:51.000+02:00
we're standardizing on this for modules (and, in general,
across Lightbend)
diff --git a/.travis.yml b/.travis.yml
@@ -12,7 +12,7 @@ env:
 script: admin/build.sh
 
 jdk:
-  - oraclejdk8
+  - openjdk8
   - openjdk11
 
 cache:
diff --git a/admin/README.md b/admin/README.md
@@ -40,8 +40,8 @@ env:
 script: admin/build.sh
 
 jdk:
-  - openjdk6
-  - oraclejdk8
+  - openjdk8
+  - openjdk11
 
 notifications:
   email:
