Remove unnecessary ini commenting from nova

Nova does not ship these options in it's api-paste.conf any more so the
functions have no effect.

Change-Id: Ie4527a0639e977e83e6bfc07751ba062839e0600
a more proper default nic selection criteria

look at all interfaces that ip link shows as being up, then filter
them for ^e or ^p devices. Should hold even after the bridges get
built.

Change-Id: If6b1e623f9d146c2430dc8a4a007997290b90846
Install 'ipmitool' package for Ironic

Ironic's reference / recommended driver is the "pxe_ipmitool" driver,
which requires the 'ipmitool' package and system binary. Thus,
devstack should install it.

Also, Ironic will soon be validating that ipmitool is present in the
system path when loading the pxe_ipmitool driver, as it does for other
drivers (seamicro, pyghmi) that have external dependencies.

Causing devstack to install this package when Ironic is enabled will
also help users who wish to test Ironic against physical hardware that
has IPMI support, without having to perform additional manual steps
(like enabling the pxe_ipmitool driver and installing the ipmitool
packge by hand).

Change-Id: I13da5f8978b280b192f9b033c348a11bfc44c9d2
Merge "a more proper default nic selection criteria"
Merge "Install 'ipmitool' package for Ironic"
Merge "Remove unnecessary ini commenting from nova"