Make travis fast again (#2308)

* make travis fast again

* Refactor Unicode test to be able to exclude python and swift

* color term expect gradlew

* do apache license header

* Use abstract class

* exclude Java

* remove initializer from abstract class
diff --git a/tests/build.gradle b/tests/build.gradle
index 718d77f..21ab9f8 100644
--- a/tests/build.gradle
+++ b/tests/build.gradle
@@ -18,6 +18,7 @@
 task testLean(type: Test) {
     exclude '**/*Swift*'
     exclude '**/*Python*'
+    exclude '**/*Java*'
     exclude '**/*ThrottleTests*'
     exclude '**/MaxActionDurationTests*'
     exclude '**/*ApiGwTests*'