sync the zypper_in logic with sle's
clear the screen to avoid finding matches of previous test on screen
Merge pull request #160 from os-autoinst/support_noautologin_gdm

support GNOME's no-autologin
Merge pull request #161 from os-autoinst/sync_zypper_in

sync the zypper_in logic with sle's
Merge pull request #162 from os-autoinst/sshfs_clean_screen

clear the screen to avoid finding matches of previous test on screen
Merge remote-tracking branch 'origin/master' into sle12

Conflicts:
	tests/console/zypper_in.pm
sync zypper_up - it doesn't make sense to make that sle specific