Power button power off behavior

Change the power button behavior to mirror the current behavior
on Power and x86 systems:
On short press: soft power off
On long press: hard power off
Resolves openbmc/openbmc#485

Change-Id: I436c364f6ed072474f942f80d98428df11b4c666
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/pychassisctl/chassis_control.py b/pychassisctl/chassis_control.py
index b3e16ff..7f14195 100755
--- a/pychassisctl/chassis_control.py
+++ b/pychassisctl/chassis_control.py
@@ -82,7 +82,7 @@
                                 dbus_interface="org.openbmc.Button",
                                 signal_name="Released",
                                 path="/org/openbmc/buttons/power0")
-        bus.add_signal_receiver(self.reset_button_signal_handler,
+        bus.add_signal_receiver(self.long_power_button_signal_handler,
                                 dbus_interface="org.openbmc.Button",
                                 signal_name="PressedLong",
                                 path="/org/openbmc/buttons/power0")
@@ -211,15 +211,16 @@
             self.powerOn()
 
     def power_button_signal_handler(self):
-        # toggle power
+        # toggle power, power-on / soft-power-off
         state = self.getPowerState()
         if state == POWER_OFF:
             self.powerOn()
         elif state == POWER_ON:
-            self.powerOff();
+            self.softPowerOff();
 
-    def reset_button_signal_handler(self):
-        self.reboot();
+    def long_power_button_signal_handler(self):
+        print "Long-press button, hard power off"
+        self.powerOff();
 
     def softreset_button_signal_handler(self):
         self.softReboot();