Fix RHEL-7 test Packer image - zerodisk.sh was removed in the recent fix to support RHEL6 - base image JSON was updated, but not the test image version
Fix RHEL-7 test Packer image
- zerodisk.sh was removed in the recent fix to support RHEL6
- base image JSON was updated, but not the test image version

pivotal-jbarrett/geode-native,pivotal-jbarrett/geode-native,pivotal-jbarrett/geode-native,pivotal-jbarrett/geode-native,pivotal-jbarrett/geode-native,pivotal-jbarrett/geode-native,pivotal-jbarrett/geode-native