Don't terminate the server on NodeDeprecationWarning (opensearch-proj…

…ect#1185)

The last AWS SDK for Javascript that supports Node 10 (v3.45.0) emits a NodeDeprecationWarning to indicate that Node 10
is no longer supported. Without this workaround, this crashes the OSD server, so it becomes impossible to interact with
other AWS services from within OSD (e.g., in a custom plugin) until the Node 14 upgrade is done.

Signed-off-by: Thilo-Alexander Ginkel <tg@tgbyte.de>

src/setup_node_env/exit_on_warning.js

@@ -31,7 +31,7 @@
  */
 
 if (process.noProcessWarnings !== true) {
-  var ignore = ['MaxListenersExceededWarning'];
+  var ignore = ['MaxListenersExceededWarning', 'NodeDeprecationWarning'];
 
   process.on('warning', function (warn) {
     if (ignore.includes(warn.name)) return;