Update TopologyTemplate.yml

openAPI/TOSCA/TopologyTemplate.yml

-TopologyTemplate:
-    type: "object"
-    properties:
-        description:
-            type: "string"
-        inputs:
-            type: "array"
-            items:
-                type: object
-                additionalProperties:
-                type: object
-        policies:
-            type: "array"
-            items:
-                type: object
-                additionalProperties:
-                type: object            
-        outputs:
-            type: "array"
-            items:
-                type: object
-                additionalProperties:
-                type: object       
-        node_templates:
-            type: object
-            additionalProperties:
-                $ref: 'https://raw.githubusercontent.com/skoulouzis/DRIP/DRIP_3.0/openAPI/TOSCA/NodeTemplate.yml#/NodeTemplate'
-        relationship_templates:
-            type: object
-            additionalProperties:
-                type: object        
-        groups:
-            type: object
-            additionalProperties:
-                type: object    
-        substitution_mappings:
-            type: object
-            additionalProperties:
-                type: object    
+  TopologyTemplate:
+      type: "object"
+      properties:
+          description:
+              type: "string"
+          inputs:
+              type: "array"
+              items:
+                  type: object
+                  additionalProperties:
+                    type: object
+          policies:
+              type: "array"
+              items:
+                  type: object
+                  additionalProperties:
+                    type: object            
+          outputs:
+              type: "array"
+              items:
+                  type: object
+                  additionalProperties:
+                    type: object       
+          node_templates:
+              type: object
+              additionalProperties:
+                  $ref: 'https://raw.githubusercontent.com/skoulouzis/DRIP/DRIP_3.0/openAPI/TOSCA/NodeTemplate.yml#/NodeTemplate'
+          relationship_templates:
+              type: object
+              additionalProperties:
+                  type: object        
+          groups:
+              type: object
+              additionalProperties:
+                  type: object    
+          substitution_mappings:
+              type: object
+              additionalProperties:
+                  type: object