pass System.getProperty() into Cli's constructor

[AionJayT]

Before filing a new issue, please provide the following information.

I'm running: 0.3.1

• Which Aion version?: 0.2.x.{git-revision}
• Which operating system?: Linux
• Which distributor and version?: Ubuntu 16.04
• How installed?: via binaries / from source
• Are you fully synchronized?: no / yes
• Did you try to restart the node?: no / yes

Your issue description goes here below. Try to include actual vs. expected behavior and steps to reproduce the issue. The current implementation uses the hard code System.getProperty() inside the CLI class. Considering pass the system property through the passing arguments.