[CHEF-1116] - Fixed the false positive issue with CronDFileOrTemplate and Updated the required Ruby version to 2.7

[ashiqueps]

Description

The following recipe will raise the CronDFileOrTemplate cop due to the regex matching in the same class.

file '/etc/cron.deny' do 
  action :delete
end

I've updated the regex so that cron.deny will no longer treated as a cron file and the current scenarios will work as it is. The samples of the regex are below.

3.1.0 :001 > exp = %r{/etc/cron\.d\b}i
 => /\/etc\/cron\.d\b/i
3.1.0 :002 > "/etc/cron.d/".match?(exp)
 => true
3.1.0 :003 > "/etc/cron.d".match?(exp)
 => true
3.1.0 :004 > "/etc/cron.d/backup".match?(exp)
 => true
3.1.0 :005 > "/etc/cron.deny".match?(exp)
 => false
3.1.0 :006 > "/etc/cron.allow".match?(exp)
 => false

Related Issue

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (non-breaking change that does not add functionality or fix an issue)

Checklist:

• I have read the CONTRIBUTING document.
• I have run the pre-merge tests locally and they pass.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• All commits have been signed-off for the Developer Certificate of Origin.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
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No Coverage information
0.0% Duplication

[ashiqueps]

The pending workflow is for Ruby 2.6 which was removed in this PR itself. Merging the PR since all other workflows are green.

[vkarve-chef]

appears to address #946