tunnel --name should rename previous tunnel (#164753)
tunnel --name should rename previous tunnel (#164753)

* tunnel --name should rename old tunnel

* fix clippy warning
microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode