travis/appveyor config changes

.travis.yml

@@ -1,5 +1,10 @@
 dist: trusty
 language: java
+
+cache:
+  directories:
+  - $HOME/.m2
+
 # Travis CI provides OpenJDK 6, OpenJDK 7, Oracle JDK 7, and Oracle JDK 8.
 # Sun JDK 6 is not provided, because it is EOL as of November 2012.
 # OpenJDK 8 is available on our Trusty images, specify dist: trusty to make use of it.
@@ -9,6 +14,7 @@ jdk:
   - openjdk8
   - openjdk7
   #- openjdk6 #https://github.com/travis-ci/travis-ci/issues/8199
-cache:
-  directories:
-  - $HOME/.m2
+
+matrix:
+  allow_failures:
+  - jdk: openjdk7