Rest API wrong endpoint error

when the endpoint to get the properties for a given definition fails, the message should not mention datastore.
here https://github.com/Talend/components/blob/a65c0c3160cf4bf3b3f6dfb638f3649ae58ff75d/services/components-api-service-rest/src/main/java/org/talend/components/service/rest/impl/PropertiesControllerImpl.java#L61