FTS-1735: Set the User-Agent header with client version

src/fts3/rest/client/request.py

@@ -87,7 +87,10 @@ class Request:
             raise ServerError(str(code))
 
     def method(self, method, url, body=None, headers=None, user=None, passw=None):
-        _headers = {"Accept": "application/json"}
+        _headers = {
+            "Accept": "application/json",
+            "User-Agent": "fts-rest-client/3.12.0",
+        }
         if headers:
             _headers.update(headers)
         if self.access_token: