Cap migrate all dbs

[carl2g]

Summary

(Guidelines for creating a bug report are available here: https://github.com/capistrano/capistrano/blob/master/DEVELOPMENT.md)

Provide a general description of the code changes in your pull request... were there any bugs you had fixed? If so, mention them. If these bugs have open GitHub issues, be sure to tag them here as well, to keep the conversation linked together.

Short checklist

• [ ] If you are fixing a bug or introducing a new feature, did you add a CHANGELOG entry?

Other Information

If there's anything else that's important and relevant to your pull request, mention that information here.

If you are updating any of the CHANGELOG files or are asked to update the CHANGELOG files by reviewers, please add the CHANGELOG entry at the top of the file where indicated.

Thanks for helping improve Capistrano!

[capistrano-bot]

	1 Warning
:warning:	Please update CHANGELOG.md with a description of your changes. If this PR is not a user-facing change (e.g. just refactoring), you can disregard this.

Thanks for the PR! This project lacks automated tests, which makes reviewing and approving PRs somewhat difficult. Please make sure that your contribution has not broken backwards compatibility or introduced any risky changes.

Here's an example of a CHANGELOG.md entry (place it immediately under the * Your contribution here! line):

* [#213](https://github.com/capistrano/rails/pull/213): Cap migrate all dbs  - [@carl2g](https://github.com/carl2g)

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