Add support for ID_BUTTON gpio in all systems

There is a gpio that supports turning a LED in to an identify LED.
Changes where made to Barreleye to support it.  This commit adds
the support to the other systems
diff --git a/bin/Garrison.py b/bin/Garrison.py
index 3f09836..e8f0927 100755
--- a/bin/Garrison.py
+++ b/bin/Garrison.py
@@ -478,6 +478,8 @@
 GPIO_CONFIG['BMC_THROTTLE'] = \
         {'gpio_pin': 'J3', 'direction': 'out'}
 
+GPIO_CONFIG['IDBTN']       = \
+    { 'gpio_pin': 'Q7', 'direction': 'out' }
 GPIO_CONFIG['POWER_BUTTON'] = \
         {'gpio_pin': 'E0', 'direction': 'both'}
 GPIO_CONFIG['RESET_BUTTON'] = \