Fix python shebang to match python3

In some of scripts we still have python shebang "#!/usr/bin/env python"
which fails in python3 hosts.
In packages it's fixed by adding pathfix.py tasks to spec files.
Add the same behavior here as we build from source, not packages.

Change-Id: I6d4f68f26b8b541bb79ae17f08015d5f27c9b7c3

roles/oooci-build-images/tasks/pre.yaml

@@ -17,6 +17,24 @@
     - "{{ python_version[python_v] }}-pip"
     - "{{ python_version[python_v] }}-virtualenv"
 
+- when: python_v == "py3"
+  block:
+
+    - name: Install python3-devel with provides pathfix.py
+      package:
+        name: python3-devel
+        state: present
+      become: true
+
+    - name: Create a script that fixes shebang for python3
+      template:
+        src: pathfix_repos.sh.j2
+        dest: "{{ workspace }}/pathfix_repos.sh"
+        mode: u=rwx
+
+    - name: Fix shebang path for python3
+      shell: bash {{ workspace }}/pathfix_repos.sh
+
 - name: pip install tripleo items
   become: true
   pip:

roles/oooci-build-images/templates/pathfix_repos.sh.j2

@@ -0,0 +1,16 @@
+#!/usr/bin/bash
+# In some of scripts we still have python shebang "#!/usr/bin/env python"
+# which fails in python3 hosts.
+# In packages it's fixed by adding pathfix.py tasks to spec files.
+# Add the same behavior here as we build from source, not packages.
+for python_file in "
+    {{ openstack_git_root }}/tripleo-image-elements/elements/os-svc-install/bin/map-services-tripleo
+    {{ openstack_git_root }}/diskimage-builder/diskimage_builder/lib/outfilter.py
+    {{ openstack_git_root }}/diskimage-builder/diskimage_builder/elements/package-installs/bin/package-installs-squash
+    {{ openstack_git_root }}/diskimage-builder/diskimage_builder/elements/svc-map/extra-data.d/10-merge-svc-map-files
+    {{ openstack_git_root }}/diskimage-builder/diskimage_builder/elements/pypi/pre-install.d/04-configure-pypi-mirror
+    {{ openstack_git_root }}/diskimage-builder/diskimage_builder/elements/deploy-targetcli/extra-data.d/module/targetcli-wrapper
+"
+do
+    /usr/bin/pathfix.py -pni /usr/bin/python3 $python_file
+done