Sync with upstream release 47.0.

Enable self-tests during build.
Add example test to be run by Taskotron.

test/help-usage-1/Makefile

@@ -0,0 +1,14 @@
+.PHONY: all install download clean
+
+BUILT_FILES=
+
+FILES=runtest.sh Makefile
+
+run: $(FILES) build
+	./runtest.sh
+
+build: $(BUILT_FILES)
+	chmod a+x ./runtest.sh
+
+clean:
+	rm -f *~ $(BUILT_FILES)

test/help-usage-1/README.rst

@@ -0,0 +1,13 @@
+help-usage-1
+============
+
+This is an example task for `Taskotron <https://fedoraproject.org/wiki/Taskotron>`_
+that tests the basic functionality of 'avocado --help' to confirm it generates a usage message.
+
+Standalone you can run it like this::
+
+  $ make run
+
+Through taskotron runner you can run it like this::
+
+  $ runtask -i python-avocado-46.0-2.fc25 -t koji_build -a noarch runtask.yml

test/help-usage-1/runtask.yml

@@ -0,0 +1,29 @@
+---
+name: help-usage-1
+desc: "Tests the basic functionality of 'avocado --help' to confirm it generates a usage message."
+maintainer: merlinm
+
+input:
+    args:
+        - koji_build
+        - arch
+
+environment:
+    rpm:
+        - make
+
+actions:
+    - name: download the build
+      koji:
+          action: download
+          koji_build: ${koji_build}
+          arch: $arch
+          target_dir: ${workdir}/rpms
+
+    - name: install the build
+      shell:
+          - dnf install -y ${workdir}/rpms/*.rpm
+
+    - name: run test
+      shell:
+          - make run

test/help-usage-1/runtest.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+PACKAGE=python-avocado
+
+# Assume the test will pass.
+result=PASS
+
+avocado --help | grep -q -i '^usage:'
+if [ $? -ne 0 ]; then
+        result=FAIL
+fi
+
+echo $result