Add new collector
Get JSON and transform it into flat metrics
collectors: fix puppetdb test class name
1 config parameter instead of 3
Now just URL, not host:port:path
Add tests
Delete needless imports
Refactoring
Rename collector
Merge pull request #573 from shoonoise/master

Add collector which convert JSON into flat metrics
Merge pull request #572 from vaijab/puppetdb_test_namefix

collectors: fix puppetdb test class name