update definitions

openAPI/TOSCA/Credentials.yml

-definitions:         
-  Credentials:
+Credentials:
     type: "object"
     properties:
         protocol:

openAPI/TOSCA/NodeTemplate.yml

-definitions:
-  NodeTemplate:
+NodeTemplate:
     type: "object"
     properties:
         name:

openAPI/TOSCA/TopologyTemplate.yml

-definitions:
-  TopologyTemplate:
+TopologyTemplate:
     type: "object"
     properties:
         description:

openAPI/TOSCA/ToscaTemplate.yml

-definitions:
-  ToscaTemplate:
+ToscaTemplate:
     type: "object"
     properties:
         tosca_definitions_version:

openAPI/User.yml

-definitions:
-    User:
+User:
     type: "object"
     properties:
     id: