Drop Oracle JDK 8.

.travis.yml

@@ -1,33 +1,33 @@
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-language: java
-sudo: required
-
-jdk:
-  - oraclejdk8
-
-env:
-  - MAVEN_OPTS="-Xmx6g -Xms2g"
-
-# only build master and the MATH_3_X branch
-branches:
-  only:
-    - develop
-    - master
-    - MATH_3_X
-
-after_success:
-  - mvn clean test jacoco:report coveralls:report
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+language: java
+sudo: required
+
+jdk:
+  - openjdk8
+
+env:
+  - MAVEN_OPTS="-Xmx6g -Xms2g"
+
+# only build master and the MATH_3_X branch
+branches:
+  only:
+    - develop
+    - master
+    - MATH_3_X
+
+after_success:
+  - mvn clean test jacoco:report coveralls:report