changes to base nova configuration

- correct typos/syntax errors in configuration scripts
- make config script consistent with other images
- do not create keystone entries in base image script

Change-Id: I42986fe1b9c80c5b0735fd70294bce1a6223a3ca
fix nova-controller pod

remove nova-controller image, which is not meant to be started directly.
add required NEUTRON_SHARED_SECRET environment variable.

Change-Id: Id671c5473db8e6e222b16ccdfd9eaedc872c60fa
Adds Neutron Server Support

Previously Kolla did not support Neutron. This patch provides
initial Neutron support by implementing neutron-server
functionality. It also creates a neutron-base image that
provides common config and packages for all Neutron-based
services.

Partially Implements: Blueprint Kubernetes Neutron Container

Change-Id: I2399a1331992fae0f387f01e5b5c1c1d34f0637d