Add compatibility for Alpine Linux

[haqa]

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Pull Request (PR) description

Enable managment of keepalived on Alpine Linux

This Pull Request (PR) fixes the following issues

[bastelfreak]

Hi @haqa, can you please add Alpine Linux to https://github.com/voxpupuli/puppet-keepalived/blob/master/metadata.json? Can you also provide alpine facts to https://github.com/camptocamp/facterdb/tree/master/facts ?

[vox-pupuli-tasks[bot]]

Dear @haqa, thanks for the PR!

This is pccibot, your friendly Vox Pupuli GitHub Bot. I noticed that your pull request contains merge conflict. Can you please rebase?

You can find my sourcecode at voxpupuli/vox-pupuli-tasks