Update to Jenkins built C7 builder

Switch to the Jenkins self-hosted packer image for CentOS7

Change-Id: I6e42ac9dc0bd5e07b2db88947de5ab5616216108
Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
diff --git a/jenkins-config/clouds/openstack/cattle/centos7-builder-1c-1g b/jenkins-config/clouds/openstack/cattle/centos7-builder-1c-1g
index 9c4364c..8a07a2a 100644
--- a/jenkins-config/clouds/openstack/cattle/centos7-builder-1c-1g
+++ b/jenkins-config/clouds/openstack/cattle/centos7-builder-1c-1g
@@ -1,3 +1,3 @@
-IMAGE_NAME=ZZCI - CentOS 7 - builder - x86_64 - 20190404-155335.124
+IMAGE_NAME=ZZCI - CentOS 7 - builder - x86_64 - 20190419-213159.723
 VOLUME_SIZE=10
 HARDWARE_ID=v2-highcpu-1