This patch:

1. Removes the krm.json file which maps machine images to kernel and ramdisks
2. Adds support to pull kernel_id and ramdisk_id directly from Glance image record.

Note: This patch is dependent upon this bug in Glance being fixed: https://bugs.launchpad.net/glance/+bug/706192

krm_mapping.json.sample

@@ -1,3 +0,0 @@
-{ 
-  "machine" : ["kernel", "ramdisk"]
-}