Extend linter rules (#1300)

- dupword checks for duplicate words in the source code
- durationcheck checks for two durations multiplied together
- forbidigo forbids identifiers
- mirror reports wrong mirror patterns of bytes/strings usage
- misspell finds commonly misspelled English words in comments
- predeclared finds code that shadows one of Go's predeclared identifiers
- thelper detects Go test helpers without t.Helper() call and checks the consistency of test helpers

management/server/http/groups_handler_test.go

@@ -230,7 +230,7 @@ func TestWriteGroup(t *testing.T) {
 			expectedBody:   false,
 		},
 		{
-			name:        "Write Group PUT not not change Issue",
+			name:        "Write Group PUT not change Issue",
 			requestType: http.MethodPut,
 			requestPath: "/api/groups/id-jwt-group",
 			requestBody: bytes.NewBuffer(

management/server/http/peers_handler_test.go

@@ -3,7 +3,6 @@ package http
 import (
 	"bytes"
 	"encoding/json"
-	"fmt"
 	"io"
 	"net"
 	"net/http"
@@ -232,7 +231,7 @@ func TestGetPeers(t *testing.T) {
 				}
 			}
 
-			fmt.Println(got)
+			t.Log(got)
 
 			assert.Equal(t, got.Name, tc.expectedPeer.Name)
 			assert.Equal(t, got.Version, tc.expectedPeer.Meta.WtVersion)

management/server/http/setupkeys_handler_test.go

@@ -220,6 +220,7 @@ func TestSetupKeysHandlers(t *testing.T) {
 }
 
 func assertKeys(t *testing.T, got *api.SetupKey, expected *api.SetupKey) {
+	t.Helper()
 	// this comparison is done manually because when converting to JSON dates formatted differently
 	// assert.Equal(t, got.UpdatedAt, tc.expectedSetupKey.UpdatedAt) //doesn't work
 	assert.WithinDurationf(t, got.UpdatedAt, expected.UpdatedAt, 0, "")