Making javadoc maven build more quiet to get around "The job exceeded the maximum log length" in travis ci (CONNECTORS-1618)

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-1618@1865272 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/.travis.yml b/.travis.yml
index 1a10c9a..3dfeb55 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@
 env:
   matrix:
     - TEST_SCRIPT="mvn -q install"
-    - TEST_SCRIPT="mvn javadoc:javadoc"
+    - TEST_SCRIPT="mvn -q javadoc:javadoc"
     - TEST_SCRIPT="ant make-core-deps make-deps test"
 script: $TEST_SCRIPT
 language: java