Clarify simulated user actions vs. normal alarm stack management

Apply "voland_autoreply_" prefix for user action functionality.
Normalize naming of voland stack management functions

Common "voland_stack_" prefix used for all functions.
Voland dbus helpers can be static
Clarify voland dbus parser helper functions

Now uses common prefix "voland_parse_" for function names.

Documented the dbus message format the parsers expect to see.
Helper script for unfreezing timed alarms

Simulates "system startup ready" signaling timed excepts to see.
Added a README file for ta_voland_service
Install alarms_unfreeze script too
Moved src/tests/ta_voland_service to tests/ta_voland_service