Python-dbusmock

- NetworkManager template: Add "StateReason" property and active connection ID
- Add low-memory-monitor template

- Fix timeouts for loaded machines and parallel tests
- Fix tests for Python 3.8

- test: Adjust for changed version output format in systemd 241

- test: Fix failures with systemd 239 in chroots

- logind template: Add support for suspend-then-hibernate
- NetworkManager template: Add GetConnectionByUuid method
- bluez template: Add PairDevice() 'class_' parameter
- Fix logging of unicode strings in Python 2
- Adjust logind and timedated tests to systemd 239 (Debian 902602)

- NetworkManager template: Add GetDeviceByIpIface().
- Move release tarballs from Launchpad to
<https://github.com/martinpitt/python-dbusmock/releases>.
<https://pypi.python.org/pypi/python-dbusmock> remains as usual.