Cleanup rspec tests of nova::client

Change-Id: I13652068ba2e99304a85cf3ac4ff0da5cd16b16b

spec/classes/nova_client_spec.rb

@@ -1,12 +1,15 @@
 require 'spec_helper'
 
 describe 'nova::client' do
-  it { should contain_package('python-novaclient').with_ensure('present') }
-  describe "with specified version" do
-  	let :params do
-      {:ensure => '2012.1-2'}
-    end
 
+  context 'with default parameters' do
+    it { should contain_package('python-novaclient').with_ensure('present') }
+  end
+
+  context 'with ensure parameter provided' do
+    let :params do
+      { :ensure => '2012.1-2' }
+    end
     it { should contain_package('python-novaclient').with_ensure('2012.1-2') }
   end
 end