TMSS-190: added duration and specified_duration as Subtask properties for reusability. Reused it in shift_successors_until_after_stop_time.

TMSS-190: use specification and scheduling relations to calculate successive subtask start/stop times

TMSS-190: renamed totaly non-descriptive names first_to_connect and second_to_connect to first_scheduling_relation and second_scheduling_relation

Resolve TMSS-215

Closes TMSS-215

See merge request !197

Resolve TMSS-238

Closes TMSS-238

See merge request !199

# Conflicts:
#	SAS/TMSS/frontend/tmss_webapp/src/App.js
#	SAS/TMSS/frontend/tmss_webapp/src/__mocks__/cycle.service.data.js
#	SAS/TMSS/frontend/tmss_webapp/src/routes/Cycle/index.js
#	SAS/TMSS/frontend/tmss_webapp/src/routes/index.js

Resolved Conflicts

 Update the code as per the review comments

Resolve TMSS-268

Closes TMSS-268

See merge request !198

TMSS-215: added action url to create a new SchedulingUnit based on this SchedulingUnitObservingStrategyTemplate, with the given <name> and <description> and make it a child of the given <scheduling_set_id>

# Conflicts:
#	SAS/TMSS/frontend/tmss_webapp/src/routes/Scheduling/SchedulingUnitList.js

Resolved conflicts and fixed task duration format and task type issues

Resolved space issue on Scheduling Unit List

TMSS-215: added foreignkeys between SchedulingUnitObservingStrategyTemplate and SchedulingUnitDraft and SchedulingUnitTemplate, and added JSON validation for SchedulingUnitObservingStrategyTemplate and if the SchedulingUnitDraft was created from a SchedulingUnitObservingStrategyTemplate

Resolve TMSS-281

Closes TMSS-281

See merge request !195

Duration Updated

Resolve TMSS-266

Closes TMSS-266

See merge request !193

Resolve TMSS-239

Closes TMSS-239

See merge request !196

TMSS-215: replaced code-wise generation of UC1 scheduling unit with the use of the new UC1 observation strategy template

TMSS-215: filled in schema names. TODO: need to replace those with proper URI's (URL's) once TMSS-272 is done and we have URL's for those schema's

TMSS-215: replaced 'data-flow' sorting by predecessor recursion because python sort does not work with proper compare functions anymore, but with key functions which address each item in the list only once O(N) while we are interested in the inter-item-relations O(N.N-1)