Get more specific with extracting Yum update list The regex would still return some additional values or blank lines. The new regex has been checked against both "yum check-update" and "yum list" and matches all currently installed version strings (including weird Git ones)

## Maintenance

Maintainers:
  - Puppet Forge Modules Team `forge-modules |at| puppet |dot| com`

Tickets: https://tickets.puppet.com/browse/MODULES. Make sure to set component to `stdlib`.