Updating javadoc

src/main/java/org/opengroup/osdu/azure/entitlements/service/EntitlementsAzure.java

@@ -236,6 +236,12 @@ public class EntitlementsAzure
 
     /**
      * Accessor for the groups for the requestor.
+     * In case request is made from a Root SP (one having access to all the groups in the tenant)
+     * we will query the TenantInfo collection to return all the groups
+     * OID for this Root SP is read from the key-vault
+     * Note: This approach of whitelisting a certain Service Principal is an interim solution
+     * to enable Root level access and will get changed once entitlements-azure has
+     * support for hierarchical groups
      * @return The groups.
      */
     public Groups getGroups()