Implement Tests for Scenario Queries that cover all cases

[dcolleoni]

General queries test and yield curve test to include cases with scenarios:

YieldCurve : Test Load Yield Curve => IFRS 17 Calculation Engine > Test > QueriesTest
IfrsVariable queries in ImportStorage : Test IfrsVariables Query => IFRS 17 Template > Test > ImportStorageTest

[dcolleoni]

Hi @amuolo @calderinisystemorph
Have a look at these tests mentioned above I think they should be updated with scenario use cases.
Thanks