rubocop: Fix Style violations

[bastelfreak]

No description provided.

[bastelfreak]

cherry-picked from #291

[codecov]

Codecov Report

Patch coverage: 0.30% and no project coverage change.

Comparison is base (c604ed5) 0.66% compared to head (0dc2419) 0.67%.

❗ Current head 0dc2419 differs from pull request most recent head e05c261. Consider uploading reports for the commit e05c261 to get more accurate results

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #308   +/-   ##
======================================
  Coverage    0.66%   0.67%           
======================================
  Files          15      15           
  Lines        1953    1929   -24     
======================================
  Hits           13      13           
+ Misses       1940    1916   -24     

Impacted Files	Coverage Δ
lib/beaker-hostgenerator/cli.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/data.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/generator.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/hypervisor.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/hypervisor/abs.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/hypervisor/docker.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/hypervisor/hcloud.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/hypervisor/unknown.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/hypervisor/vagrant.rb	0.00% <0.00%> (ø)
lib/beaker-hostgenerator/hypervisor/vmpooler.rb	0.00% <0.00%> (ø)
... and 3 more

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.