Increase Java heap space for Maven job

release-java-daily fails due to a Java heap space
limitation. Increasing this value as per the suggested
resolution:
http://cwiki.apache.org/confluence/display/MAVEN/OutOfMemoryError

Change-Id: I02096c05723d2a78f7ef6fd259401d3c19d4c65a
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
diff --git a/jjb/global-templates-java.yaml b/jjb/global-templates-java.yaml
index 580d65b..90c0061 100644
--- a/jjb/global-templates-java.yaml
+++ b/jjb/global-templates-java.yaml
@@ -423,6 +423,8 @@
             -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn'
           properties:
             - '{maven-deploy-properties}'
+          java-opts:
+            - '-Xmx4096m -XX:MaxPermSize=512m'
           settings: '{mvn-settings}'
           settings-type: cfp
           global-settings: 'global-settings'