Write tests for initial value initial value specification D.8

- Also removed race conditions in the test.

Print test name.

- use DummyRegister::getRawAccessor for access to backend registers.
- read and write convenience methods for rawAccessor.

- runtimeErrorHandling_testPushTypeReadNonBlocking

- Reworked header.

- Reworked header.

- Reworked Header.
- Revised variable name. version -> versionBeforeRuntimeError

- tests still failing
- modifications incomplete
- cleanup needed

testProcessVariableRecovery: waiting for device to be opened avoids race conditin with runtime error

fixture_with_poll_and_push_input exposes pollVariable, pushVariable as
refernce types for convenience.

Fixture with poll and push inputs can be reused in testing Exception handling.

Only the blocking read in wfnd TEs will update the module's version

This fixes a race condition when the initial value reading was not done
when the test started, creating unexpected version changes