attempt _use_metadata fix from j-c-m

dnsapi/dns_aws.sh

@@ -239,7 +239,7 @@ _use_metadata() {
       _normalizeJson |
       tr '{,}' '\n' |
       while read -r _line; do
-        _key="$(echo "${_line%%:*}" | tr -d '"')"
+        _key="$(echo "${_line%%:*}" | tr -d '\"')"
         _value="${_line#*:}"
         _debug3 "_key" "$_key"
         _secure_debug3 "_value" "$_value"