Update the service-info to use the ga4gh discovery standard in progre…

…ss (resolves #264) (#277)

* Update the service-info to use the ga4gh discovery standard in progress

Removed the following:

-title
-contact
-license

Otherwise the [service-info endpoint proposal](https://github.com/ga4gh-discovery/ga4gh-service-info/blob/develop/service-info.yaml) is almost identical to what we had already.

* fix build problem (by adding dist: trusty)

openapi/data_repository_service.swagger.yaml

@@ -353,25 +353,30 @@ definitions:
   ServiceInfo:
     type: object
     required:
+      - id
+      - name
       - version
     description: >-
       Useful information about the running service.
     properties:
-      version:
+      id:
         type: string
-        description: Service version
-      title:
+        description: Unique ID of this service. Reverse domain name notation is recommended, though not required.  
+      name:
         type: string
-        description: Service name
+        description: Name of this specific service.
       description:
         type: string
-        description: Service description
-      contact:
-        type: object
-        description: Maintainer contact info
-      license:
-        type: object
-        description: License information for the exposed API
+        description: Description of the service.
+      documentationUrl:
+        type: string
+        description: URL of the documentation of this service (RFC 3986 format).
+      contactUrl:
+        type: string
+        description: 'URL of the contact for the host/maintainer of this service, e.g. a link to a contact form (RFC 3986 format), or an email (RFC 2368 format).'
+      version:
+        type: string
+        description: Version of the service.
   ContentsObject:
     type: object
     properties: