Jonathan Rosser e596ee101b Add cron as a required package
The role sets up crontab entries but assumes that the environment
has cron installed. This patch ensures that assumption is correct.

Change-Id: I354f30462205dbf34de946260204b63c11488049
2018-10-24 17:21:45 +01:00
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2018-10-24 17:21:45 +01:00
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