2 emulator bugs fixes

1. Support to launch 2.4 version of full emulator. The command line argument has been changed for launching  full emulator, so powershell needs to refresh. I also added a testing scenario in the  "VerifyAzureSDK.ps1", so next time on refreshing sdk we will catch it
2.  I saw several duplicate resources strings among "command.common" and "command.utility", I went ahead and cleaned them up