Add env vars for S3_BUCKET for Jenkins

Error:
Unrecognized macro 'S3_BUCKET' in '$S3_BUCKET'], action = [Don't run]

Issue-ID: CIMAN-33 IT-19659
Change-Id: Ia49defc18613c3b9cdad8bb1208f57e00ebd779e
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>
diff --git a/jenkins-config/global-vars-production.sh b/jenkins-config/global-vars-production.sh
index d450c7b..3c83f0a 100644
--- a/jenkins-config/global-vars-production.sh
+++ b/jenkins-config/global-vars-production.sh
@@ -15,6 +15,7 @@
 REGISTRY_PORTS=10001 10002 10003 10004
 RELEASE_EMAIL=collab-it+onap-release@linuxfoundation.org
 RELEASE_USERNAME=onap-release
+S3_BUCKET=
 SIGUL_BRIDGE_IP=10.30.104.3
 SIGUL_KEY=onap-release-2018
 SILO=production