Cinder should use lioadm on Fedora

Fedora has lioadm in since F18. It should be default
for any RedHat based system except RHEL6 based ones.

Change-Id: I469f77cd5a77f9c6bc87e16c6faf5ca9612992ef

manifests/params.pp

@@ -50,7 +50,7 @@ class cinder::params {
         }
       }
       default: {
-        $iscsi_helper = 'tgtadm'
+        $iscsi_helper = 'lioadm'
       }
     }
 

spec/classes/cinder_volume_iscsi_spec.rb

@@ -49,7 +49,9 @@ describe 'cinder::volume::iscsi' do
     end
 
     let :facts do
-      {:osfamily => 'RedHat'}
+      {:osfamily => 'RedHat',
+       :operatingsystem => 'RedHat',
+       :operatingsystemmajrelease => '6'}
     end
 
     it { should contain_file_line('cinder include').with(