1. add skyline-functional-devstack which inherits from devstack
2. add skyline-functional-devstack into check and gate job
3. add playbook to integrate with devstack for zuul
4. change the port from 8080 to 9999 because the 8080 is used for s3api
5. rename functional-py38 as unittest-py38
6. add install extra tools ready for skyline-console's e2e test
Change-Id: I7f4b549bec6573661e62dd2bd9a3355253afd47d
Add devstack plugin for skyline to deploy by devstack.
There are six main functions for this plugin:
1. install_skyline: to install main dependency of environment,
skyline-apiserver and skyline-console
2. configure_skyline: to config skyline.conf for skyline-apiserver
and nginx.conf for nginx
3. init_skyline: create database of skyline and make db sync
4. start_skyline: start skyline-apiserver as systemd and start nginx
5. stop skyline: stop skyline-apiserver and stop nginx
6. cleanup_skyline: remove all config directories
Change-Id: I632f059b26a3d8612fc1008758f1844498ce7b84
