venv: create venv & run pip in exec

Tempest deleted the venv management scripts [1] so now, puppet-tempest
is able to deploy the venv & run pip by itself.

[1] https://review.openstack.org/#/c/270564/

Closes-Bug: #1570268
Change-Id: Iacfe61a14d69a8738a4cc4e2cfe29f7d54e91941

manifests/init.pp

@@ -297,7 +297,7 @@ class tempest(
     if $setup_venv {
       # virtualenv will be installed along with tox
       exec { 'setup-venv':
-        command => "/usr/bin/python ${tempest_clone_path}/tools/install_venv.py",
+        command => "/usr/bin/virtualenv ${tempest_clone_path}/.venv && ${tempest_clone_path}/.venv/bin/pip install -U -r requirements.txt",
         cwd     => $tempest_clone_path,
         unless  => "/usr/bin/test -d ${tempest_clone_path}/.venv",
         require => [

manifests/params.pp

@@ -10,7 +10,7 @@ class tempest::params {
         'openssl-devel',
         'libffi-devel',
         'patch',
-        'gcc',
+        'gcc'
       ]
       $python_aodh_tests       = 'python-aodh-tests'
       $python_ceilometer_tests = 'python-ceilometer-tests'
@@ -41,6 +41,7 @@ class tempest::params {
         'libffi-dev',
         'patch',
         'gcc',
+        'python-virtualenv',
       ]
       $python_aodh_tests       = false
       $python_ceilometer_tests = false

spec/classes/tempest_spec.rb

@@ -317,7 +317,8 @@ describe 'tempest' do
                               'libssl-dev',
                               'libffi-dev',
                               'patch',
-                              'gcc' ] }
+                              'gcc',
+                              'python-virtualenv' ] }
         when 'RedHat'
           { :dev_packages => ['python-devel',
                               'libxslt-devel',