Make vcloud-tools-tester available for use
Update CI scripts to get test params from git
Update documentation re vcloud-tools-tester

* Top level README simplified
* Integration test specific README added, detailing how to use vcloud-tools-tester
* Template vcloud-tools-tester config added
update gitignore
Update QueryRunner test to use vcloud-tools-tester
move Core::QueryRunner test to correct dir
Merge pull request #55 from alphagov/add_tools_tester2

[#65363454] Add use of vcloud-tools-tester into Core integration tests