Fix Swagger JSON autogeneration issues. (#4845)

* Fix Swagger JSON.

Remove unnecessary schema references for the forbidden and empty responses

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Fix swagger API for CreateAccessToken

* Fix admin create org swagger

* Fix swagger for adminCreateRepo

* More swagger fixes

Set int64 format for those which are int64
Some more form fixes

* Fix swagger description of GET /repos/{owner}/{repo}/pulls

routers/api/v1/repo/milestone.go

@@ -70,6 +70,7 @@ func GetMilestone(ctx *context.APIContext) {
 	//   in: path
 	//   description: id of the milestone
 	//   type: integer
+	//   format: int64
 	//   required: true
 	// responses:
 	//   "200":
@@ -156,6 +157,7 @@ func EditMilestone(ctx *context.APIContext, form api.EditMilestoneOption) {
 	//   in: path
 	//   description: id of the milestone
 	//   type: integer
+	//   format: int64
 	//   required: true
 	// - name: body
 	//   in: body
@@ -211,6 +213,7 @@ func DeleteMilestone(ctx *context.APIContext) {
 	//   in: path
 	//   description: id of the milestone to delete
 	//   type: integer
+	//   format: int64
 	//   required: true
 	// responses:
 	//   "204":