Handle InvalidArgument error for hostname

Systemd throws InvalidArgument error for hostname with special
characters.

This commit handles InvalidArgument error.

Tested By:
verified by passing hostname with special char

Change-Id: I732ce9705044d45a25c05f0164bfa5e47e03f025
Signed-off-by: Ravi Teja <raviteja28031990@gmail.com>
1 file changed