Move all python tests to pytest

* Add configuration to add report header for python client used in tests
* Move report headers into the individual test runners vs runner.sh

Signed-off-by: Jhon Honce <jhonce@redhat.com>

test/apiv2/python/conftest.py

@@ -0,0 +1,8 @@
+"""
+Configure pytest
+"""
+
+
+def pytest_report_header(config):
+    """Add header to report."""
+    return "python client -- requests library"

test/apiv2/python/requirements.txt

@@ -0,0 +1,5 @@
+requests-mock~=1.9.3
+requests~=2.20.0
+setuptools~=50.3.2
+python-dateutil~=2.8.1
+PyYAML~=5.4.1