[CI]Chaostest suite initiation (#5793)

* Initiate chaostest cli test suite: singlenodeheight on one dev node
    Added chaostest stages in CI
    Added new docker/k8s resources and environments to CI
    Added new chaos-only tag to gitlab-ci.yml

* Update .maintain/chaostest/src/commands/singlenodeheight/index.js

Co-authored-by: Max Inden <mail@max-inden.de>

* change nameSpace to namespace(one word)

* update chaos ci job to match template

* rename build-pr ci stage to docker [chaos:basic]

* test gitlab-ci [chaos:basic]

* Update .gitlab-ci.yml

* add new build-chaos-only condition

* add *default-vars to singlenodeheight [chaos:basic]

* change build-only to build-rules on substrate jobs [chaos:basic]

* test and change when:on_success to when:always [chaos:basic]

* resolve conflicts and test [chaos:basic]

Co-authored-by: Max Inden <mail@max-inden.de>
Co-authored-by: Denis Pisarev <denis.pisarev@parity.io>

substrate/.maintain/chaostest/README.md

@@ -0,0 +1,89 @@
+chaostest
+=========
+
+A cli for chaos testing on substrate
+
+[![oclif](https://img.shields.io/badge/cli-oclif-brightgreen.svg)](https://oclif.io)
+[![Version](https://img.shields.io/npm/v/chaostest.svg)](https://npmjs.org/package/chaostest)
+[![Downloads/week](https://img.shields.io/npm/dw/chaostest.svg)](https://npmjs.org/package/chaostest)
+
+<!-- toc -->
+* [Usage](#usage)
+* [Commands](#commands)
+<!-- tocstop -->
+# Usage
+<!-- usage -->
+```sh-session
+$ npm install -g chaostest // yarn add global chaostest
+$ chaostest COMMAND
+running command...
+$ chaostest (-v|--version|version)
+chaostest/0.0.0 darwin-x64 node-v8.16.0
+$ chaostest --help [COMMAND]
+USAGE
+  $ chaostest COMMAND
+...
+```
+<!-- usagestop -->
+# Commands
+<!-- commands -->
+* [`chaostest spawn`](#chaostest-spawn)
+* [`chaostest singlenodeheight`](#chaostest-singlenodeheight)
+* [`chaostest clean`](#chaostest-clean)
+
+## `chaostest spawn`
+
+Spawn a testnet based on your local k8s configuration. Could be either a dev node, a two node alicebob chain or a customized chain with various validators/fullnodes.
+
+```
+USAGE
+  $ chaostest spawn [ARGUMENTS] [FLAGS]
+
+Arguments
+  dev,  a single fullnode in --dev mode
+  alicebob, a two nodes private chain with Alice as bootnode and Bob as validator
+  [chainName], a customized chain deployed with -v numbers of validators and -n numbers of fullnodes
+
+Flags
+  --image, -i, the image tag of the certain substrate version you want to deploy
+  --port, -p, the port to expose when image is deployed in a pod
+  --namespace, the desired namespace to deploy on
+  --validator, -v, the number of substrate validators to deploy
+  --node, -n, the number of full nodes, if not set but exists, default to 1
+  
+DESCRIPTION
+  ...
+  Extra documentation goes here
+```
+
+_See code: [src/commands/spawn/index.js](https://github.com/paritytech/substrate/blob/harry/chaostest-init/.maintain/chaostest/src/commands/spawn/index.js)_
+
+## `chaostest singlenodeheight`
+
+Test against a fullnode on --dev mode to check if it can successfully produce blocks to a certain height.
+
+```
+USAGE
+  $ chaostest singlenodeheight [FLAGS]
+
+FLAGS
+  -h , the desired height of blocks to check if reachable, this only works with integers smaller than 2^6 
+  -t, the wait time out before it halts the polling
+```
+
+_See code: [src/commands/singlenodeheight/index.js](https://github.com/paritytech/substrate/blob/harry/chaostest-init/.maintain/chaostest/src/commands/singlenodeheight/index.js)_
+
+## `chaostest clean`
+
+Clean up the k8s deployment by namespace.
+
+```
+USAGE
+  $ chaostest clean [FLAGS]
+
+FLAGS
+  -n , the desired namespace to delete on your k8s cluster
+```
+
+_See code: [src/commands/clean/index.js](https://github.com/paritytech/substrate/blob/harry/chaostest-init/.maintain/chaostest/src/commands/clean/index.js)_
+<!-- commandsstop -->