Replace virtualenv-tools by a script

virtualenv-tools has a bug which gets triggered in gates: it can't
change the shebang of a virtualenv python bin/ files if they
were generated with a virtualenv script whose shebang ends with
python2 instead of python.

Because we can't modify virtualenv-tools, we use shell scripts
instead.

Change-Id: I068bef7dcf354349a576ddf3dd3438f6489ffc4a
Partial-Bug: #1741634

defaults/main.yml

@@ -212,7 +212,6 @@ ironic_tftp_server_address: "{{ ansible_host }}"
 
 ironic_requires_pip_packages:
   - virtualenv
-  - virtualenv-tools
   - python-keystoneclient # Keystoneclient needed for the OSA keystone lib
   - httplib2 # for Ansible's uri module
 

tasks/ironic_install.yml

@@ -109,9 +109,12 @@
     - ironic_get_venv | changed
 
 - name: Update virtualenv path
-  command: >
-    virtualenv-tools --update-path=auto --reinitialize {{ ironic_bin | dirname }}
+  shell: |
+    find {{ ironic_bin }} -name \*.pyc -delete
+    sed -si '1s/^.*python.*$/#!{{ ironic_bin | replace ('/','\/') }}\/python/' {{ ironic_bin }}/*
   when: ironic_get_venv | changed
+  tags:
+    - skip_ansible_lint
 
 - name: Record the venv tag deployed
   ini_file: