Add tools to run jenkins jobs and remote commands

- ./tcp_tests/utils/create_devops_env.py
  Creates a fuel-devops enviromnet with VMs in disabled
  state, to generate networks and addresses for inventory.
  Required parameters:
    export ENV_NAME=test
    export LAB_CONFIG_NAME=<template directory with underlay.yml>
    export MANAGER=devops
  Other parameters may be required for the underlay.yml

  CLI example:
    export PYTHONPATH=$(pwd)
    python ./tcp_tests/utils/create_devops_env.py

- ./tcp_tests/utils/run_jenkins_job.py
  Run a jenkins job with parameters, wait for completion,
  print the console output to stdout while waiting.
  Required parameters:
    export JENKINS_URL=http://host:port/
    export JENKINS_USER=admin
    export JENKINS_PASS=admin
  CLI example:

    JOB_PARAMETERS="{
      \"SALT_MASTER_URL\": \"${SALTAPI_URL}\",
      \"STACK_INSTALL\": \"core,cicd\"
    }"
    JOB_PREFIX="[ {job_name} #{build_number}:cicd {time} ] "

    python ./tcp_tests/utils/run_jenkins_job.py \
        --verbose \
        --job-name=deploy_openstack \
        --job-parameters="$JOB_PARAMETERS" \
        --job-output-prefix="$JOB_PREFIX"

- ./tcp_tests/utils/get_param.py
  Get a single parameter from the salt pillar.
  Useful to get addresses and other scalar values.
  Required parameters are the same as for 'pepper' CLI:
    export SALTAPI_URL=http://${SALT_MASTER_IP}:6969/
    export SALTAPI_USER='salt'
    export SALTAPI_PASS='icecream12345!'
    export SALTAPI_EAUTH='pam'
  CLI example:
  export JENKINS_HOST=$(./tcp_tests/utils/get_param.py \
    -C 'I@docker:client:stack:jenkins' \
    pillar.get jenkins:client:master:host)

- ./tcp_tests/utils/run_template_commands.py
  Run remote commands from the ./tcp_tests/templates/
  No environment varialbes are required, but may be
  useful to provide the INI config from some completed
  deployment.
  CLI example:

    export TESTS_CONFIGS=$(pwd)/test_salt_deployed.ini
    ./tcp_tests/utils/run_template_commands.py \
        ./tcp_tests/templates/<lab_name>/common_services.yaml

- some env files for sourcing to get access to different APIs.
  This will simplify using the scripts above.

    . ./tcp_tests/utils/env_salt          # salt-api access
    . ./tcp_tests/utils/env_jenkins_day01 # jenkins on salt-master
    . ./tcp_tests/utils/env_jenkins_cicd  # jenkins on cicd
    . ./tcp_tests/utils/env_k8s           # k8s api access

- fixed UnderlayManager.sudo_check_call() to remove
  deprecation warning.

Improvements to JenkisClient:
- Add JenkinsWrapper class to workaround the bug
  https://bugs.launchpad.net/python-jenkins/+bug/1775047
  which is happened to CICD Jenkins behind the haproxy
- improved waiting for start of the job in run_build()
- new argument 'interval' in wait_end_of_build(), to set
  the polling interval while waiting the job
- new argument 'job_output_prefix' in wait_end_of_build(),
  which allows to set the prefix to each line of the console
  output of the job; with some pre-defined template keys.
- improved printing the job output in case of non-unicode characters

Change-Id: Ie7d1324d8247e55ba9c0f0492ca39fc176ff4935
diff --git a/tcp_tests/utils/get_param.py b/tcp_tests/utils/get_param.py
new file mode 100755
index 0000000..6179e70
--- /dev/null
+++ b/tcp_tests/utils/get_param.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+
+"""
+A wrapper to ``pepper``, a CLI interface to a remote salt-api instance.
+
+Return a single parameter from the salt model for specified
+target and pillar.
+
+Fails if the result contains more than one parameter.
+
+Use the pepper CLI parameters to set salt-api access parameters
+or set the environment variables:
+
+  export SALTAPI_URL=http://${SALT_MASTER_IP}:6969/;
+  export SALTAPI_USER='salt';
+  export SALTAPI_PASS='pass';
+  export SALTAPI_EAUTH='pam';
+"""
+from __future__ import print_function
+
+import sys
+import json
+
+from pepper import cli
+
+
+runner = cli.PepperCli()
+runner.parser.description = __doc__
+
+
+if len(sys.argv) <= 1:
+    sys.argv.append('--help')
+
+results = []
+for res in runner.run():
+    results.append(res)
+
+if not results:
+    print("Empty response", file=sys.stderr)
+    sys.exit(1)
+
+if len(results) > 1:
+    print("Too many results", file=sys.stderr)
+    sys.exit(1)
+
+if results[0][0] != 0:
+    print("Error code returned", file=sys.stderr)
+    sys.exit(results[0][0])
+
+data = json.loads(results[0][1])
+nodes = data['return'][0].keys()
+
+if not nodes:
+    print("Wrong target: no minions selected", file=sys.stderr)
+    sys.exit(1)
+
+if len(nodes) > 1:
+    print("Wrong target: too many minions selected: {0}"
+          .format(nodes), file=sys.stderr)
+    sys.exit(1)
+
+print(data['return'][0][nodes[0]])