Normalize uuid_node into node_uuid in case automatic UUID generation …

…is asked for

Make sure we are using node_uuid which is semantically more accurate and will match what @alliomeria  has also. 
This won't break existing Templates since the mapping is stored in the config. This is just the default for new ones.

src/Form/AmiMultiStepIngest.php

@@ -460,7 +460,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         $amisetdata->column_keys = $data['headers'];
         $amisetdata->total_rows = $data['totalrows'];
         // We should probably add the UUIDs here right now.
-        $uuid_key = isset($amisetdata->adomapping['uuid']['uuid']) && !empty($amisetdata->adomapping['uuid']['uuid']) ? $amisetdata->adomapping['uuid']['uuid'] : 'uuid_node';
+        $uuid_key = isset($amisetdata->adomapping['uuid']['uuid']) && !empty($amisetdata->adomapping['uuid']['uuid']) ? $amisetdata->adomapping['uuid']['uuid'] : 'node_uuid';
         // We want to reset this value now
         $amisetdata->adomapping['uuid']['uuid'] = $uuid_key;
         $fileid = $this->AmiUtilityService->csv_save($data, $uuid_key);