change default shell to "sh" instead of "bash", change default mysql user to "root"

pkg/models/terminal.go

@@ -271,7 +271,7 @@ func WaitForTerminal(k8sClient kubernetes.Interface, cfg *rest.Config, request *
 		close(terminalSessions[sessionId].bound)
 
 		var err error
-		validShells := []string{"bash", "sh"}
+		validShells := []string{"sh", "bash"}
 
 		if isValidShell(validShells, shell) {
 			cmd := []string{shell}

pkg/options/options.go

@@ -107,7 +107,7 @@ func (s *ServerRunOptions) addFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&s.mysqlPasswd, "mysql-password", "123456",
 		"Password of mysql")
 
-	fs.StringVar(&s.mysqlUser, "mysql-user", "mysql",
+	fs.StringVar(&s.mysqlUser, "mysql-user", "root",
 		"User of mysql.")
 
 	fs.StringVar(&s.opAddress, "openpitrix-address", "http://openpitrix-api-gateway.openpitrix-system.svc",