Merge branch 'master' of https://git.floop.org.uk/git/ONS/pmd-jenkins-library into add_tests

uploadCodelist first deletes codelist graph to clear out any previous mistakes

Test for jobDraft.replace() issue. Extend Exception rather than Throwable.

Test for and add cache buster config as part of publish.

Implement Drafter.publishDraftset()

Apache components HttpHost uses -1 as default port for scheme; see if that helps with pre-emptive basic auth.

Use husdon.FilePath() to get file InputStream. May need special handling for remote nodes, see https://stackoverflow.com/questions/41250567/using-filepath-to-access-workspace-on-slave-in-jenkins-pipeline

Start verifying pipeline requests.

Use Apache http components directly in cube import pipeline, with attempt to use FileInputStream for streaming potentially large HTTP requests.

Try implementing with callable global to set things up and compiled class implementing drafter methods. Use test JSON files as responses.

Add configFileProvider and credentials binding plugins, for testing Jenkins stored parameters.

Merge remote-tracking branch 'origin/master' into add_tests

drafter.queryDraft with GET instead of POST

Configure http-request not to throw `hudson.AbortException` on 4XX

Fix query url

Attempt to set Accept as custom header, not using acceptType param

Candidate version of drafter.queryDraftset

Ignore IntelliJ .idea dir

Factor out components and codelists table2qb pipelines.

Add pipeline-utility-steps for readJSON

Add test based on https://github.com/mkobit/jenkins-pipeline-shared-libraries-gradle-plugin. Currently times-out after sending and receiving HTTP req/res.

Ensure data inserted into jobDraft

Delete by path not label

Delete jobDraft only if present

Debugging issue with uploadTidy() not appearing to be called when optional datasetPath argument isn't supplied.

uploadTidy takes optional datasetPath argument ...

Also requires that we delete datasets by path, not label

Improved jobDraft logging

jobDraft.replace Try with finally

Split draft creation and use ...

Requires drafts to be created in the job, not per operation

drafter.findOrCreateDraftset