rm oraclejdk7 (travis-ci/travis-ci#7884 (comment))

Author: oblonski

.travis.yml

@@ -3,7 +3,7 @@ sudo: false
 matrix:
   fast_finish: true
   include:
-    - jdk: oraclejdk7
+    - jdk: openjdk7
     - jdk: oraclejdk8
       # Java 9 needs to be manually installed/upgraded
       # see: https://github.com/travis-ci/travis-ci/issues/2968#issuecomment-149164058
@@ -24,9 +24,6 @@ env:
 #    - secure: "j6a61/qnfFcSjx5XxmxO2hqBOwtVx5HWrD1+4Atl7WG/pRKz9+jSga1Y7oDAFb2SIl8S65kDmPQB/vC8aHxUDj/Wizjxnxn1FhPqoe9yO6Ztft+984FKFyvj7s6tsBJKcehGec+chTOwZQpH4oI4rU6IlepDHnGLHiOd0Iviryg="
 #    - secure: "GiFr+v2lTQk/sTQB7CYjju1/mupS8LSJupmizLqY454utiZkabDMBOZQnF9ukpy7WhveB9hKQyEKf9iP2w7HSYEjgvogT26vZ5f2MeLnR4SWvqEtf/WBvvh+W+k/rb2f6YgitkB4Jlxn2izemBEDuKplGJphzGW41lf8XZ2IxVI="
 
-jdk:
-  - openjdk7
-
 before_install:
    # update maven
    - if [ "$TRAVIS_OS_NAME" == "linux" ]; then