Upgrade Cucumber on Jenkins isotesters

Originally created by @intrigeri on #17080 (Redmine)

Once we’ve done #10068 (closed) we might be able to upgrade to Cucumber 2.x from Stretch, while we’re currently running 1.3 from Jessie.

Goals:

• stop running Jessie-era Cucumber on our CI
• avoid confusion between what developers see locally and what our CI does (e.g. tails#16150 (comment 12284))
• fix tails#16150 (closed)
• unblock tails#10328 (closed)

See tails#10328 (closed) for things that might need to happen at the same time.

Finally, as part of this ticket, we should revert eccc25460099522ad26d33c93f3d70601ae63ee9.

Feature Branch: puppet-tails:cucumber2, jenkins-jobs:cucumber2

Related issues

• Related to #11739 (closed)
• Blocked by #10068 (closed)
• Blocks tails#16150 (closed)
• Blocks tails#10328 (closed)
• Blocks tails#17083 (closed)