gnu: python-pbr: Update to 7.0.1.

This change is to simplify bootstrap for python-pbr. All of the native
inputs were added to active tests but the #:tests? was set to false
making no sense to keep them.

* gnu/packages/python-xyz.scm (python-pbr): Update to 7.0.1.
Do not inherit from python-pbr-minimal and migrate all missing fields.
[build-system]: Switch to pyprject-build-system.
[propagated-inputs]: Remove git-minimal/pinned; add python-setuptools.
[native-inputs]: Remove python-fixtures-bootstrap, python-mock,
python-six, python-sphinx, python-testrepository-bootstrap,
python-testresources-bootstrap, python-testscenarios-bootstrap,
python-testtools-bootstrap, and python-virtualenv.

Change-Id: I5e53fd5ebd9bb0cfdd8e1da1c1a3d797a7bbfaeb

gnu/packages/python-xyz.scm

@@ -6937,30 +6937,33 @@ code introspection, and logging.")
 
 (define-public python-pbr
   (package
-    (inherit python-pbr-minimal)
     (name "python-pbr")
+    (version "7.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pbr" version))
+       (sha256
+        (base32 "0mvy1z1dyl28w0brns1vdhc98hzbn5b3fsw1xj41amdqs88wpjry"))))
+    (build-system pyproject-build-system)
     (arguments
      `(#:tests? #f)) ;; Most tests seem to use the Internet.
+    ;; Message from upstream:
+    ;;
+    ;; DO NOT add any other dependencies as PBR is meant to be minimalist to
+    ;; avoid problems with bootstrapping build environments.
+    ;;
+    ;; See: <https://opendev.org/openstack/pbr/src/tag/7.0.1/requirements.txt>.
     (propagated-inputs
-      (list git-minimal/pinned)) ;; pbr actually uses the "git" binary.
+     (list python-setuptools))
-    (native-inputs
+    (home-page "https://docs.openstack.org/pbr/latest/")
-      `(("python-fixtures" ,python-fixtures-bootstrap)
-        ;; discover, coverage, hacking, subunit
-        ("python-mock" ,python-mock)
-        ("python-six" ,python-six)
-        ("python-sphinx" ,python-sphinx)
-        ("python-testrepository" ,python-testrepository-bootstrap)
-        ("python-testresources" ,python-testresources-bootstrap)
-        ("python-testscenarios" ,python-testscenarios-bootstrap)
-        ("python-testtools" ,python-testtools-bootstrap)
-        ("python-virtualenv" ,python-virtualenv)))
     (synopsis "Enhance the default behavior of Python’s setuptools")
     (description
      "Python Build Reasonableness (PBR) is a library that injects some useful
 and sensible default behaviors into your setuptools run.  It will set
 versions, process requirements files and generate AUTHORS and ChangeLog file
-from git information.
+from git information.")
-")))
+    (license license:asl2.0)))
 
 (define-public python-pbr-next
   (hidden-package