Added changes to make ACME_EMAIL to default email (#1314)

Author: jitendramahari

scripts/hyperconverged-lab.sh

@@ -89,9 +89,12 @@ done
 
 if [ -z "${ACME_EMAIL}" ]; then
   read -rp "Enter a valid email address for use with ACME, press enter to skip: " ACME_EMAIL
-  export ACME_EMAIL="${ACME_EMAIL:-}"
 fi
 
+# Use of ACME_EMAIL to default Email
+ACME_EMAIL="${ACME_EMAIL:-example@aol.com}"
+export ACME_EMAIL
+
 if [ -z "${GATEWAY_DOMAIN}" ]; then
   echo "The domain name for the gateway is required, if you do not have a domain name press enter to use the default"
   read -rp "Enter the domain name for the gateway [cluster.local]: " GATEWAY_DOMAIN