pull_request_template.md

NOTE: this repository uses a "Merge Forward" strategy

Changes should be made in the earliest applicable branch, and merged forward through subsequent branches.

1. PR should be created against the oldest stemcell branch, ex: ubuntu-<short_name-N>
2. After this PR has been merged create a PR to merge ubuntu-<short_name-N> into ubuntu-<short_name-N+1>
3. Repeat as needed for subsequent stemcell line branches