Fix swagger errors (#4220)

Fix all the resting errors to have a valid swagger file.

They are still some warnings but nothing blocking.

Doing so I found that some request still misses son parameters for some POST/PUT/PATCH request. This means the a client generated from the swagger file will not work completely. 

Fix #4088 by activating validation in drone
Should fix #4010.

routers/api/v1/swagger/repo.go

@@ -102,6 +102,7 @@ type swaggerResponseWatchInfo struct {
 // SearchResults
 // swagger:response SearchResults
 type swaggerResponseSearchResults struct {
+	// in:body
 	Body api.SearchResults `json:"body"`
 }