fixed plane test

See merge request !73

[Enh] Checking existence of UUID Destination/Airline, location of unusedPlanes before timeframe

See merge request !67

Resolve "Adding a new destination should return ID"

See merge request !70

[Feat] Initial version of steward metrics

See merge request !69

# Conflicts:
#   domain-module/src/main/java/cz/muni/fi/pa165/airportmanager/domainmodule/dto/finddto/PlaneFindDto.java

[Enh] Adding a new flight returns ID

See merge request !71

Error 500 flight handling

See merge request !65

[Enh] Adding a new steward returns UUID

See merge request !63

[Fix] SQL query for isStewardAvailable

See merge request !68

[Enh] Steward microservice port change

See merge request !66

Steward issues + Subsequent times testing issues + Entity annotations

See merge request !62

Resolving issue #30