TMSS-435: Return json object with sunrise, sunset, day and night times at sun_rise_and_set call, handle multiple stations and timestamps provided as parameters

(cherry picked from commit 3bec3e06)

Resolve TMSS-422

Closes TMSS-422

See merge request !266

Resolve TMSS-403

Closes TMSS-403

See merge request !257

TMSS-403: Improvement: use build/installed TMSS settings module and LOFARROOT for static files and templates so that django toolbar and frontend work out of the box

Resolve TMSS-337

Closes TMSS-337

See merge request !264

Resolve TMSS-318

Closes TMSS-318

See merge request !261

Resolve TMSS-309

Closes TMSS-309

See merge request !263

Resolve SW-933

Closes SW-933

See merge request !258

TMSS-337 Add testcase for checking relative_start/stop_time and observation_end_time using UC1 stategy template

Resolve TMSS-416

Closes TMSS-416

See merge request !259

TMSS-337 Remove 'default' value in SchedulingUnitBlueprint and add propertyobserved_end_time in TaskBlueprint

Resolve TMSS-324

Closes TMSS-324

See merge request !256

Project column removed from the SU List in the project view.