Deal with collection build modifying tree

ansible-galaxy collection build modifies the contents of the tree.
Let's not go in to why this is bad, but instead just deal with it.
The issue in question is that is removes the +x bit from files in
the tree, which means you can't run a build twice in a row locally.
Shrug. Just roll with the -x and update our usage to reflect it.

Change-Id: I0f82531e99a98d656b60079fd3e94d4e3a1dbb6b

ci/run-ansible-tests-collection.sh

@@ -1,4 +1,3 @@
-#!/bin/bash
 #############################################################################
 # run-ansible-tests.sh
 #

tests/sanity/ignore-2.10.txt

@@ -132,4 +132,3 @@ tests/unit/modules/conftest.py future-import-boilerplate
 tests/unit/modules/conftest.py metaclass-boilerplate
 tests/unit/modules/utils.py future-import-boilerplate
 tests/unit/modules/utils.py metaclass-boilerplate
-ci/run-ansible-tests-collection.sh shebang

tests/sanity/ignore-2.9.txt

@@ -121,4 +121,3 @@ tests/unit/modules/conftest.py future-import-boilerplate
 tests/unit/modules/conftest.py metaclass-boilerplate
 tests/unit/modules/utils.py future-import-boilerplate
 tests/unit/modules/utils.py metaclass-boilerplate
-ci/run-ansible-tests-collection.sh shebang

tox.ini

@@ -29,7 +29,7 @@ commands =
 
 [testenv:build]
 commands =
-    {toxinidir}/tools/build.py
+    python {toxinidir}/tools/build.py
     ansible-galaxy collection build --force {toxinidir} --output-path {toxinidir}/build_artifact
 
 [testenv:linters]
@@ -65,4 +65,4 @@ deps =
     {toxinidir}/../openstacksdk
     ansible
 commands =
-    {toxinidir}/ci/run-ansible-tests-collection.sh -e {envdir} {posargs}
+    /bin/bash {toxinidir}/ci/run-ansible-tests-collection.sh -e {envdir} {posargs}