HOTFIX: Don't build Javadoc in Maven when creating releases.

Because we've added java package descriptions in some packages that don't
have any Java files, running the Javadoc target hits this issue:

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4492654

To fix this I've simply removed the javadoc target when publishing
releases.

dev/create-release/create-release.sh

@@ -49,16 +49,18 @@ if [[ ! "$@" =~ --package-only ]]; then
   mvn -Pyarn release:clean
 
   mvn -DskipTests \
-    -Darguments="-DskipTests=true -Dhadoop.version=2.2.0 -Dyarn.version=2.2.0 -Dgpg.passphrase=${GPG_PASSPHRASE}" \
+    -Darguments="-DskipTests=true -Dmaven.javadoc.skip=true -Dhadoop.version=2.2.0 -Dyarn.version=2.2.0 -Dgpg.passphrase=${GPG_PASSPHRASE}" \
     -Dusername=$GIT_USERNAME -Dpassword=$GIT_PASSWORD \
+    -Dmaven.javadoc.skip=true \
     -Dhadoop.version=2.2.0 -Dyarn.version=2.2.0 \
     -Pyarn -Phive -Phadoop-2.2 -Pspark-ganglia-lgpl\
     -Dtag=$GIT_TAG -DautoVersionSubmodules=true \
     --batch-mode release:prepare
 
   mvn -DskipTests \
-    -Darguments="-DskipTests=true -Dhadoop.version=2.2.0 -Dyarn.version=2.2.0 -Dgpg.passphrase=${GPG_PASSPHRASE}" \
+    -Darguments="-DskipTests=true -Dmaven.javadoc.skip=true -Dhadoop.version=2.2.0 -Dyarn.version=2.2.0 -Dgpg.passphrase=${GPG_PASSPHRASE}" \
     -Dhadoop.version=2.2.0 -Dyarn.version=2.2.0 \
+    -Dmaven.javadoc.skip=true \
     -Pyarn -Phive -Phadoop-2.2 -Pspark-ganglia-lgpl\
     release:perform