BUG Fix framework versioning

[tractorcow]

If the module being tested === sapphire / framework, then the package generated in composer.json should probably use the CORE_RELEASE instead of the branch name for the framework version.

This would fix issues where pulls to 'pulls/fix-broken-thing' to framework would know what version of framework it's fixing, where previously the module would rely on the branch name to determine this.

[tractorcow]

And this would allow people to run tests on their own forks instead of having to make PR. :) @dhensby

[dhensby]

YER! DAN!!!!