Fix race condition with extension loading. (#4724)

Signed-off-by: Panu Horsmalahti <phorsmalahti@mirantis.com>

src/extensions/extension-loader/extension-loader.ts

@@ -325,6 +325,8 @@ export class ExtensionLoader {
               extension,
             );
 
+            this.instances.set(extId, instance);
+
             return {
               extId,
               instance,
@@ -353,8 +355,6 @@ export class ExtensionLoader {
         logger.error(`${logModule}: failed to enable`, { ext: extension, err });
       });
 
-      this.instances.set(extension.extId, extension.instance);
-
       return {
         isBundled: extension.isBundled,
         loaded,