resolve JJB GC issue

change mvn-option

Change-Id: I944f6ed73e0565ff4e1259305b615c5aa65a19e6
Issue-ID: APPC-1711
Signed-off-by: Taka Cho <takamune.cho@att.com>
diff --git a/jjb/appc/appc-master.yaml b/jjb/appc/appc-master.yaml
index 01e65b2..0439505 100644
--- a/jjb/appc/appc-master.yaml
+++ b/jjb/appc/appc-master.yaml
@@ -4,7 +4,7 @@
     project-name: 'appc'
     jobs:
       - '{project-name}-{stream}-verify-java':
-          mvn-params: '-Xmx512m -XX:MaxPermSize=128m'
+          mvn-params: '-DMAVEN_OPTS=-Xmx1024m -XX:MaxPermSize=256m'
           build-node: ubuntu1604-builder-8c-8g
       - '{project-name}-{stream}-merge-java':
           build-node: ubuntu1604-builder-8c-8g