[HBASE-24349] Use rubocop 0.81.0 in Dockerfile

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.2.5
• Fix Version/s: 2.2.5
• Component/s: build
• Assignee: Peter Somogyi
• Reporter: Peter Somogyi
• Created: 11/May/20 15:18
• Updated: 12/May/20 13:10
• Resolved: 12/May/20 08:36

Description

Nightly branch-2.2 docker image is broken as a result of rubocop 0.82.0 which dropped support for Ruby 2.3