[releng] Issue #7268: Wrongly-formed `Fedora-Modular--updates-testing-20171031.0` compose still present in updates dir

[Suzanne Yeghiayan]

The issue: `Wrongly-formed `Fedora-Modular--updates-testing-20171031.0` compose still
present in updates dir` of project: `releng` has been assigned to `mohanboddu` by
syeghiay.

https://pagure.io/releng/issue/7268