Task #11020: Added docstrings to schedulers and fixed a problem with instantiating  the DwellScheduler.

Task #10780: Added unit test to cover some more pushing back start/end times situations. Test coverage 92%

Task #10948: Renamed assigment.py to resource_assigner.py, and revived unit tests for ResourceAvailabilityChecker (one test still requires discussion, see TODO). Currently working on unit tests for ResourceAssigner itself.

Task #10780: Fixed use case where task start_time > now and  end_time < start_time resulted in an failing RPC to RADBService. InsertSpecificationAndTask()  - failing since RADB doesn't allow for end_time < start_time. New behavior is in these cases to change end_time to end_time = start_time + 1 hour

Task #10780: Refactored ResourceAssigner such that it uses the new DwellScheduler (instead of resource_availability_checker.get_is_claimable()), refactored ResourceAvailabilityChecker such that it can be injected into the schedulers. The latter is still a work in progress: refer to the TODOs in these files for more information.

Task #10780: ResourceAvailabilityChecker and ResourceAssigner and their unit tests are separated now, and fully PASS

Task #10780: Done refactoring ResourceAssigner, ResourseAvailabilityChecker still to refactor and move to separate file

Task #10780: Started refactoring doAssignment() up until the call to the findclaims() function. Refactored unit tests accordingly.

Task #9939: assigner, RAtoOTDB propagator: address Auke's review comments + a few small cleanups of my own

Task #10801: Fixed indentations, added test for invalid root_resource_group, fixed test for RCUs, fixed duplicate test names

Task #10801: Remove task from findClaims and helper functions, and add tests for findClaims/fitSingleResources/fitMultipleResources

Task #10801: Moved db_resource_prop_types, db_storage_type_id, db_rcu_type_id, db_rgp2rgp, db_resource_types to (cached) properties to avoid excessive propagation of function arguments that are actually fixed values.

Task #10784: Renamed claim status "claimed" (ID 0) to "tentative" and claim status "allocated" (ID 1) to "claimed" in both Python code and  database creation/allocation scripts. Successfully verified that all unit tests that originally passed still pass, and that those that originally didn't pass, don't give new errors.

Task #9939: RA assigner: add comments to clarify warning wrt not finding predecessor and successor to link to in radb

Task #9939: RA: re-enable some unit tests in t_resourceassigner and remove some others no longer useful. Also fix error path bug in assigner and ensure assigner code coverage reports uncovered line list of ResourceAssigner modules. This commit supplements r37300. All regression tests now pass (without disabling any test).

Task #9939: RA: rework estimator format to fix predecessor issues with calibration pipeline. Also adjust and much better document other estimators. Small adjustment to assigner wrt properties. This prepares for more testing on the test sys, so this commit likely contains brown paper bugs.

Task #9939: RA: adjust estimator pipelines to new estimator format. Also minor adjustments to assigner prop handling. Tests still to fix.

Task #10695: Removed Observation.Scheduler.taskDuration, added a timestamp parser function to PyCommon, and do not silently fail on unparsable startTime/stopTime in paret.

Task #10560: Fixed t_resourceassigner again, after it got broken during sprint 5 integration (for demo).