Fixed: TNS run command broken with using --watch

[tzraikov]

Fixes #2150

[KristinaKoeva]

It seems to me that passing boolean parameter to the runPlatform, deployOnDevice and deployOnEmulator overcomplicates the interface. I would suggest separating the methods, so that you can call something like the following in your command

public executeCore(args: string[], buildConfig?: IBuildConfig): IFuture<void> {
                this.$platformService.deploy(args[0], buildConfig).wait();
   		if (this.$options.watch) {
  			return this.$usbLiveSyncService.liveSync(args[0]);
  		}

                return this.$platformService.startApplication(args[0], buildConfig).wait();
 	}

Where the deploy method would be responsible only for deploying an application on device/simulator and the startApplication would be responsible only for running an application on device/simulator