ktest: Set CLOSE_CONSOLE_SIGNAL in the kvm.conf

As mentioned at commit 5a5d8e48, we can't terminate 'virsh console'
with the default signal(INT). So it's better to set CLOSE_CONSOLE_SIGNAL
in the kvm.conf.

Link: http://lkml.kernel.org/r/8738jatylb.wl%satoru.takeuchi@gmail.com



Signed-off-by: Satoru Takeuchi <satoru.takeuchi@gmail.com>
[ Typo fixed by ]
Signed-off-by: MUNEDA Takahiro <muneda.takahiro@jp.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>