Generate random SG rule names in terraform

genereate_tf_sg_names.sh

# we already have entities like " resource "openstack_networking_secgroup_rule_v2" "offline_secgroup_rule_extra_" {}"
# and want to generate uniq postfixes for them
for lineNum in $(grep -Rin "rule_extra" main.tf | cut -f2 -d:); do sed -i '' "${lineNum}s/rule_extra_/rule_extra_$(openssl rand -hex 3)/" main.tf; done