The current snaps now have well-known aliases defined at install time
for commands [1]. This means we can drop the manual alias definition
from snapcraft.yaml and the instructions for setting it up.
When building/installing locally users can still create the aliases
with 'snap alias'.
[1] https://forum.snapcraft.io/t/auto-aliases-for-openstack-base-snaps/1146/6
Change-Id: I2eef1705d5e1c01e4f8b76ebdbbaf64374df7272
The following are included in the switch to strict confinement:
* Set snapcraft.yaml confinement to strict and restore/update plugs
* Drop building of python as it's not required for strict snaps
* Switch back to running apps under root
* Build bridge-utils, iptables, iproute2, and libxml2 into snap
Change-Id: I58bc68a946b832ddba5630abf9f2fd5174afed65
Enable the ability for default config files to be overridden.
Also refresh the README while documenting how default config files can
be overridden.
Change-Id: I809c98090e68a2ecddf56971da10f13e3eb6000c
