This PR was merged into the 4.4 branch.Discussion----------Improve .travis.yml| Q             | A| ------------- | ---| Branch?       | 4.4| Bug fix?      | no| New feature?  | no| Deprecations? | no| Tickets       | -| License       | MIT| Doc PR        | -Follow up of#41293- For the highest branch (6.0 right now), when deps=high, the version before it is checked out (5.4) and tested with the locally patched components (6.0)- For `*.4` branches, aka when the current branch version has not the same major version number as the next one, in addition to testing with the next major as deps (6.0 deps on patched-5.4), we also checkout the previous major and test it with the locally patched components (aka patched-5.4 deps on 4.4).Commits-------2620da2 Improve .travis.yml