Fix test compilation errors

spec/classes/server/slapdconf_spec.rb

@@ -4,6 +4,7 @@ describe 'openldap::server::slapdconf' do
   on_supported_os.each do |os, os_facts|
     context "on #{os}" do
       let(:facts) { os_facts }
+      let(:pre_condition) { "class {'openldap::server':}" }
 
       it { is_expected.to compile }
     end

spec/defines/server/globalconf_spec.rb

@@ -2,8 +2,9 @@ require 'spec_helper'
 
 describe 'openldap::server::globalconf' do
   let(:title) { 'namevar' }
+  let(:pre_condition) { "class {'openldap::server':}" }
   let(:params) do
-    {}
+    { value: 'bar' }
   end
 
   on_supported_os.each do |os, os_facts|