shelldriver: Disable kernel messages after console_ready

With this change the ShellDriver treats console activation like a new
login and thus disabling kernel messages on that shell.

Until now the ShellDriver would _not_ silence the kernel messages on a
console, if it was only activated but no login was needed.

Signed-off-by: Chris Fiege <[email protected]>

Author: SmithChart

labgrid/driver/shelldriver.py

@@ -169,6 +169,7 @@ def _await_login(self):
                 # lets start over again and see if login or prompt will appear
                 # now.
                 self.console.sendline("")
+                did_login = True
 
             last_before = before