pr2_self_test: 1.0.7-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `pr2_self_test` to `1.0.7-0`:

- upstream repository: https://github.com/PR2/pr2_self_test.git
- release repository: https://github.com/TheDash/pr2_self_test-release.git
- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.14`
- previous version for package: `1.0.6-0`