iOS app is restarted few times on HMR crash

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 5.3.0
• Cross-platform modules: 5.3.0
• iOS Runtime: 5.3.0

Describe the bug

To Reproduce

1. tns create jsApp --js && cd jsApp
2. tns run ios --hmr
3. Crash the app (e.g. edint app.js and require /application instead of tns-core-modules/application)
4. The app will try to start 5 times before the livesync process stop.

Expected behavior
The app should try to start 2 times (1 for the HMR sync and 1 for the HMR crash fallback)

使用 tns create jsApp --js 复现该行为，然后运行 tns run ios --hmr 并应用文档所述的 application 导入更改。跟踪 HMR 和 livesync 的重启处理；完成标准是，发生崩溃时，在 livesync 停止之前只进行两次启动尝试，而不是五次。