Engine: Updating available Rake tasks and adding Rake task to reset Katello
data via Pulp, Candlepin, Elasticsearch and Database.
Merge pull request #3299 from ehelms/engine-tasks

Engine: Updating available Rake tasks and adding Rake task to reset Kate...
Engine: Enable missing glue layer test inclusion.
Merge pull request #3314 from ehelms/engine-enable-glue-pulp

Engine: Enable missing glue layer test inclusion.
Engine: Fixed changeset_test tests