Add IPMI driver.
Add IPMI driver.

Change-Id: Ic3b9aac6aa0184949b4bf85644d8e6c07ef3df1f

stackforge/kwapi,stackforge/kwapi,lpouillo/kwapi-g5k,openstack/kwapi,stackforge/kwapi,stackforge/kwapi,lpouillo/kwapi-g5k,openstack/kwapi,lpouillo/kwapi-g5k,openstack/kwapi,lpouillo/kwapi-g5k,openstack/kwapi