Add the credential id and metadata from the form to the dependency array of useCallback when testing cred plugin configuration. This allows us to remove the variables passed in to the request.

awx/ui_next/src/screens/Credential/shared/CredentialPlugins/CredentialPluginPrompt/MetadataStep.jsx

@@ -34,11 +34,11 @@ function MetadataStep({ i18n }) {
     request: testPluginMetadata,
   } = useRequest(
     useCallback(
-      async (credential, metadata) =>
-        CredentialsAPI.test(credential.id, {
-          metadata,
+      async () =>
+        CredentialsAPI.test(selectedCredential.value.id, {
+          metadata: inputValues.value,
         }),
-      []
+      [selectedCredential.value.id, inputValues.value]
     ),
     null
   );
@@ -159,7 +159,7 @@ function MetadataStep({ i18n }) {
           variant="primary"
           type="submit"
           onClick={() =>
-            testPluginMetadata(selectedCredential.value, inputValues.value)
+            testPluginMetadata()
           }
         >
           {i18n._(t`Test`)}