Add support to install via package

Change-Id: I76e16413e9f9a4da50019c0d7384cf29f923f7b1
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

defaults/main.yaml

@@ -23,6 +23,8 @@ virtualenv_git_version: master
 
 virtualenv_install_method: git
 
+virtualenv_package_name: python3-virtualenv
+
 virtualenv_pip_name: virtualenv
 #virtualenv_pip_extra_args:
 #virtualenv_pip_version:

tasks/install/package.yaml

@@ -0,0 +1,19 @@
+# Copyright 2018 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+---
+- name: Install virtualenv from package
+  become: yes
+  package:
+    name: "{{ virtualenv_package_name }}"
+    state: present