Align stars to fix ci

1) Pin fast_gettext
The fast_gettext gem 1.2.0 and greater require ruby 2.1 which we don't
have.

2) Pass a generic cpu to qemu instead of trying to pass host-model

We don't need to pass any CPU extensions in the gate, given the
context where we don't use KVM or (proper) nested virtualization.
Truthfully, this also becomes required as there are upcoming changes
in qemu-kvm 2.6.0 which breaks us when trying to pass extensions
while using qemu.

Worth noting that devstack has been setting 'none' [1] as well.

[1]: 1c442eebc8/lib/nova_plugins/hypervisor-libvirt (L42)

Change-Id: I881bd712266ae63b0ac9074ec18bd6a41b946c3a

Gemfile

@@ -4,6 +4,7 @@ group :development, :test, :system_tests do
   gem 'puppet-openstack_spec_helper',
       :git     => 'https://git.openstack.org/openstack/puppet-openstack_spec_helper',
       :require => false
+  gem 'fast_gettext', ['< 1.2.0']
 end
 
 if facterversion = ENV['FACTER_GEM_VERSION']

install_modules.sh

@@ -22,6 +22,8 @@ source $SCRIPT_DIR/functions
 
 print_header 'Start (install_modules.sh)'
 print_header 'Install r10k'
+# fast_gettext 1.2.0+ requires ruby 2.1.0
+gem install fast_gettext -v '< 1.2.0'
 gem install r10k --no-ri --no-rdoc
 
 # make sure there is no puppet module pre-installed

manifests/nova.pp

@@ -9,6 +9,11 @@
 #   (optional) Libvirt domain type. Options are: kvm, lxc, qemu, uml, xen
 #   Defaults to 'qemu'
 #
+# [*libvirt_cpu_mode*]
+#   (optional) The libvirt CPU mode to configure.
+#   Possible values include custom, host-model, none, host-passthrough.
+#   Defaults to 'none'
+#
 # [*volume_encryption*]
 #   (optional) Boolean to configure or not volume encryption
 #   Defaults to false.
@@ -16,6 +21,7 @@
 class openstack_integration::nova (
   $libvirt_rbd       = false,
   $libvirt_virt_type = 'qemu',
+  $libvirt_cpu_mode  = 'none',
   $volume_encryption = false,
 ) {
 
@@ -121,6 +127,7 @@ class openstack_integration::nova (
   }
   class { '::nova::compute::libvirt':
     libvirt_virt_type     => $libvirt_virt_type,
+    libvirt_cpu_mode      => $libvirt_cpu_mode,
     migration_support     => true,
     vncserver_listen      => '0.0.0.0',
     # TODO: enable it again when puppet 4.5 will be idempotent