Remove repos before testing on RedHat

If extra repos are installed, we do not install the default version of
nginx we want to test.

Author: smortex

spec/acceptance/nginx_server_spec.rb

@@ -3,6 +3,20 @@
 require 'spec_helper_acceptance'
 
 describe 'nginx::resource::server define:' do
+  it 'remove leftovers from previous tests', if: fact('os.family') == 'RedHat' do
+    pp = "
+    yumrepo { 'nginx-release':
+      ensure => absent,
+    }
+    yumrepo { 'passenger':
+      ensure => absent,
+    }
+    "
+    apply_manifest(pp, catch_failures: true)
+    shell('yum -y remove nginx nginx-filesystem passenger nginx-mod-mail')
+    shell('yum clean all')
+  end
+
   context 'new server on port 80' do
     it 'configures a nginx server' do
       pp = "