Provide proper plugin info for test runs

[bookwar]

JJB constructs different XML outputs based on plugin information provided to it.

Thus result you get by running test command with query_plugin_info=false parameter, is going to be different from the result you get on the properly set Jenkins Master.

We need to add a reference plugin information, and test our configs against it.

[bookwar]

For test runs JJB can use a yaml file instead of connection to Jenkins via

jenkins-jobs --conf example.conf test -p plugin_info.yaml jobs/

Yaml needs to be in the form:

- description-setter:
    shortName: description-setter
    longName: Description Setter Plugin
    version: 1.2.3

To get such a yaml from existing Jenkins instance one can use script like this:

#!/usr/bin/env python

import argparse
import ConfigParser
import jenkins
import yaml

parser = argparse.ArgumentParser()
parser.add_argument("-c", "--conf", required=True,
                    help="Path to jenkins-job-builder config file")
args = parser.parse_args()

config = ConfigParser.RawConfigParser()
config.read(args.conf)

jenkinsurl = config.get('jenkins', 'url')
username = config.get('jenkins', 'user')
password = config.get('jenkins', 'password')

j = jenkins.Jenkins(jenkinsurl, username, password)

data = j.get_plugins()
plugin_info = []

for shortName, longName in data.keys():
    plugin_info.append({
        shortName: {
            'longName': longName,
            'shortName': shortName,
            'version': "{0}".format(data[shortName]['version']),
        }
    })
    

with open('plugins_info.yaml','w') as f:
    f.write(yaml.dump(plugin_info, default_flow_style=False))