TMSS-322 Add log_url to SubTasks. Pipeline will have a link based on RADBID (so subtask needs at least be scheduled). Observation will have a link to cobalt error log based on its subtask id. Also convenient function for scheduling_unit_blueprint added

TMSS-307: Add raw_feedback to subtask model and service to append feedback that arrives on messagebus

TMSS-272: extracted common data structures into commonschematemplates. updated all templates with 's to the commonschematemplates. tweaked and updated using code. fixed tests

TMSS-272: always inject a resolvable valid URL in the  property to the uploaded json-doc. Always add known defaults to json_doc from the schema.

TMSS-272: cleaned up SAS/TMSS/src/tmss/tmssapp/validation.py validation code from tmss. Moved remaining clean code into LCS/PyCommon/json_utils.py

TMSS-280: Move UniqueConstraint for Template to superclass since Django 3.0 use interpolation of class. Actually we use this version already. Check at tmss_test_environment for version

TMSS-207:  renamed TaskConnector to TaskConnectorType, and the related names of the input_role and output_role. Simplified and made code more generic for linking the created TaskBlueprints from the existing TaskDraft and TaskRelationDraft

TMSS-200: Remove SubtaskInputSelectionTemplate since and use TaskRelationSelectionTemplate instead. Fix test.

TMSS-207: raise SubtaskSchedulingException when start/stop times are None. add default start/stop times.

TMSS-206: added easy to use properties successors and predecessors to SubTaks, and expose them via nested urls

TMSS-180: (and TMSS-60) implemented a TMSSSubTaskBusListener in a TMSSClient package, and used it to send/receice TMSS Subtask status changes messages

TMSS-60: added related names to input/outputs/dataproducts of subtask models and viewsets, so we can 'walk the graph'

TMSS-56: as discussed with the architect, the scheduler_input_doc is not needed, so I removed it (which also solved the issue with serializers/scheduling.py where the SubtaskSerializerJSONeditorOnline referred to the incorrect self.instance.specifications_template.schema)

TMSS-61: add functionality to connect observation output to preprocessing pipeline and use that populate demo stuff