Fix test setup based on os.family

Due to usage of a symbol instead of a String, we always ended in the
`else` case because `os[:family]` is nil.

There is also a mix of os.name and os.family, and string comparison is
case sensitive in Ruby, so rework the code to do the expected thing.

spec/spec_helper_acceptance_local.rb

@@ -28,20 +28,14 @@ def create_repo
 
   # Configure all nodes in nodeset
   c.before :suite do
-    case os[:family]
-    when 'redhat'
+    case os['family']
+    when 'Debian', 'RedHat', 'Suse'
       LitmusHelper.instance.apply_manifest("package { 'epel-release': ensure => present, }") if os[:name] != 'Fedora'
       pp = <<-PP
       package { 'git': ensure => present, }
       package { 'subversion': ensure => present, }
       PP
       LitmusHelper.instance.apply_manifest(pp)
-    when %r{(ubuntu|[dD]ebian|sles)}
-      pp = <<-PP
-      package { 'git-core': ensure => present, }
-      package { 'subversion': ensure => present, }
-      PP
-      LitmusHelper.instance.apply_manifest(pp)
     else
       unless LitmusHelper.instance.run_bolt_task('package', 'action' => 'status', 'name' => 'git')
         puts 'Git package is required for this module'