HCK-7390: add localization variable with entity separator (#20)

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<td>
<a href="https://hackolade.atlassian.net/browse/HCK-7390"
title="HCK-7390" target="_blank"><img alt="Sub-bug"
src="https://hackolade.atlassian.net/rest/api/2/universal_avatar/view/type/issuetype/avatar/10303?size=medium"
/>HCK-7390</a> Use underscore in relationship names
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  <br />
 

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package.json

@@ -49,7 +49,10 @@
             "enableReverseEngineeringDetectionSchemaByContent": false,
             "enableReversingDateTypeAsISODate": true,
             "supportInferRelationships": true,
-            "enableREQueryAndSortCriteria": true
+            "enableREQueryAndSortCriteria": true,
+            "relationships": {
+                "entityNameSeparator": "."
+            }
         }
     },
     "description": "Hackolade plugin for Amazon DocumentDB",