Create diskimage_builder_pip_virtualenv_python

Allow the user to pick the version of python needed for the
virtualenv.

Change-Id: I2e544f8bdd48cdbdb973dec844a2a9b56c473aae
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

defaults/main.yaml

@@ -27,4 +27,5 @@ diskimage_builder_install_method: git
 diskimage_builder_pip_name: diskimage-builder
 # diskimage_builder_pip_extra_args:
 # diskimage_builder_pip_version:
+# diskimage_builder_pip_virtualenv_python:
 # diskimage_builder_pip_virtualenv:

tasks/install/pip.yaml

@@ -18,4 +18,5 @@
     extra_args: "{{ diskimage_builder_pip_extra_args|default(omit) }}"
     name: "{{ diskimage_builder_pip_name }}"
     version: "{{ diskimage_builder_pip_version|default(omit) }}"
+    virtualenv_python: "{{ diskimage_builder_pip_virtualenv_python|default(omit) }}"
     virtualenv: "{{ diskimage_builder_pip_virtualenv|default(omit) }}"

tests/inventory

@@ -1,2 +1,2 @@
-[test]
-test01 ansible_host=127.0.0.2
+[all]
+localhost ansible_connection=ssh

tests/test.yaml

@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 ---
-- hosts: test
+- hosts: localhost
   vars:
     rolename: "{{ lookup('pipe', 'pwd') | dirname | basename }}"
   pre_tasks: