Add inactivity jobs to job manager, fixes #366 #2211

Job	Run time
wagon_tests / feature specs	6m 11s
wagon_tests / rubocop	3m 0s
wagon_tests / specs	8m 18s
wagon_tests / seeds	7m 28s
wagon_tests / notify_statuscope / notify-statuscope	3s
	25m 0s

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