Update orchestrator-client to append headers_auth

Currently if `$headers_auth` is set, it will replace any previous settings in `$requires_auth`. This change updates the script to append `$headers_auth` to `$requires_auth` instead of replace.

Author: tomkrouper

resources/bin/orchestrator-client

@@ -158,7 +158,7 @@ function get_curl_auth_params {
   fi
 
   if [[ -n "${headers_auth}" ]]; then
-    requires_auth="-H "${headers_auth}""
+    requires_auth+=" -H "${headers_auth}""
   fi
 
   # Test API access