Add retry on HTTP 429 (#274)

Co-authored-by: Serge Smertin <[email protected]>

Author: nfx

common/http.go

@@ -207,6 +207,12 @@ func (c *DatabricksClient) checkHTTPRetry(ctx context.Context, resp *http.Respon
 		// In this case don't retry and return the original error from httpclient
 		return false, err
 	}
+	if resp.StatusCode == 429 {
+		return true, APIError{
+			ErrorCode: "TOO_MANY_REQUESTS",
+			Message:   "Current request has to be retried",
+		}
+	}
 	if resp.StatusCode >= 400 {
 		apiError := c.parseError(resp)
 		return apiError.IsRetriable(), apiError