Fix shebang for a python scripts in test dir

Introduced in https://review.opendev.org/533028.

Change-Id: If74b611ffd13d11c308459ab935b45ad94aff14a

openstack-swift.spec

@@ -86,6 +86,7 @@ BuildRequires:    python3-devel
 BuildRequires:    python3-setuptools
 BuildRequires:    python3-pbr
 BuildRequires:    git-core
+BuildRequires:    /usr/bin/pathfix.py
 
 BuildRequires:    systemd
 Obsoletes:        openstack-swift-auth  <= 1.4.0
@@ -334,6 +335,9 @@ rm -f %{buildroot}%{python3_sitelib}/swift/locale/*/LC_*/swift*po
 rm -f %{buildroot}%{python3_sitelib}/swift/locale/*pot
 mv %{buildroot}%{python3_sitelib}/swift/locale %{buildroot}%{_datadir}/locale
 
+# Fix shebangs for Python 3-only distros
+pathfix.py -pni "%{__python3} %{py3_shbang_opts}" %{buildroot}%{python3_sitelib}/swift/test
+
 # Find language files
 %find_lang swift --all-name