CABPI-395: Fix Failed Magento Health Index Tests

Author: adifucan

app/code/Magento/AdminAdobeIms/Model/ImsWebapi.php

@@ -175,6 +175,8 @@ public function getExtensionAttributes(): ImsWebapiExtensionInterface
      */
     public function setExtensionAttributes(ImsWebapiExtensionInterface $extensionAttributes): ImsWebapiInterface
     {
-        return $this->_setExtensionAttributes($extensionAttributes);
+        $this->_setExtensionAttributes($extensionAttributes);
+
+        return $this;
     }
 }