quickstack_defaults.rb tweak to handle empty arrays
Synchronize hostgroups.yaml with seeds.rb
Merge pull request #324 from rohara/galera

BZ#1121760 - Run clustercheck before setting galera property
Merge pull request #320 from jistr/hostgroups_yaml

Synchronize hostgroups.yaml with seeds.rb
Merge pull request #317 from cwolferh/param_setting_handle_empty_array

quickstack_defaults.rb tweak to handle empty arrays