Capistrano - lookup fallback changelog from git

[arthurwozniak]

Overview

PR #1498 introduced a regression in the resolution of changelog content. Originally, when newrelic_revision or newrelic_changelog was missing and SCM was in use, revision/changelog was taken from SCM (https://github.com/newrelic/newrelic-ruby-agent/pull/1498/files#diff-8617c3d884fd8d418ce71c6e5c8b3574b405debef725642d04cd1fa2db1d0596L39).

However, refactoring kept this logic only for revision (https://github.com/newrelic/newrelic-ruby-agent/pull/1498/files#diff-62409e781fcfec20b77d79fd9f324cd395030f9b7ae9fb3a85c4a0e92f7add3dR39), not changelog (https://github.com/newrelic/newrelic-ruby-agent/pull/1498/files#diff-62409e781fcfec20b77d79fd9f324cd395030f9b7ae9fb3a85c4a0e92f7add3dR31).

This PR adds a fallback to the changelog resolution from GIT.

Reviewer Checklist

• Perform code review
• Add performance label
• Perform appropriate level of performance testing
• Confirm all checks passed
• Add version label prior to acceptance

[CLAassistant]

All committers have signed the CLA.

[fallwith]

Hi @arthurwozniak. Thank you very much for your contribution! Your explanation was helpful and your changes make sense. These changes will be included in the next version of the project gem.

[fallwith]

Hi @arthurwozniak. This change has now gone out with v8.14.0 of the newrelic_rpm gem. Thanks again, and welcome to our CHANGELOG as a recognized contributor!