Remove novnc from vncproxy packages list for Ubuntu

Package resources can no longer have array for name since Puppet 3.4.

Since the package nova-novncproxy already requires novnc,
we can safely remove it from the list of packages to install.

Closes-bug: #1263293
Change-Id: Iba7ff0b7aedd750a54d931e0e8cbe37418ed6aed

manifests/params.pp

@@ -91,7 +91,7 @@ class nova::params {
         }
         default: {
           $spicehtml5proxy_package_name = 'nova-spiceproxy'
-          $vncproxy_package_name    = ['novnc', 'nova-novncproxy']
+          $vncproxy_package_name    = 'nova-novncproxy'
           $vncproxy_service_name    = 'nova-novncproxy'
           # some of the services need to be started form the special upstart provider
           $special_service_provider = 'upstart'

spec/classes/nova_vnc_proxy_spec.rb

@@ -24,7 +24,7 @@ describe 'nova::vncproxy' do
     it { should contain_nova_config('DEFAULT/novncproxy_port').with(:value => '6080') }
 
     it { should contain_package('nova-vncproxy').with(
-      :name   => ["novnc", "nova-novncproxy"],
+      :name   => 'nova-novncproxy',
       :ensure => 'present'
     ) }
     it { should contain_service('nova-vncproxy').with(