try fix travis build for java11/12

mostroverkhov · mostroverkhov · commit 62d0ad73c005 · 2019-05-14T21:00:23.000+03:00
Signed-off-by: Maksym Ostroverkhov &lt;m.ostroverkhov@gmail.com&gt;
diff --git a/build.gradle b/build.gradle
@@ -116,6 +116,10 @@ subprojects {
 
             systemProperty "io.netty.leakDetection.level", "ADVANCED"
         }
+        
+        tasks.named("javadoc").configure {
+            onlyIf { System.getenv('SKIP_RELEASE') != "true" }
+        }
     }
 
     plugins.withType(JavaLibraryPlugin) {
