Exclude 'setup_repositories' task from graph
Exclude 'setup_repositories' task from graph

'setup_repositories' task had 'upload_core_repos' name in 7.0
release. Anyway, it's not necessary to specify this task in
tasks set as it's running on all nodes(the same for 'setup_repos'
task in >7.0 releases).

Change-Id: I413da7ac0874c601294a33782c1038924d39187d
Closes-Bug: #1539611

stackforge/fuel-plugin-detach-rabbitmq