10 - enhancing the controller advice class

[SivaTharun]

Overview

• added different exception handler methods to handle BadRequestException,ErrorSavingEntityToDatabaseException, ResourceNotFoundException
  Connects FEATURE: Enable Global Exception #10

Notes

• changes to add exception handler for different exception belonging to this application

[SivaTharun]

@ohbus can i add new unit test class to verify the exception handler capability.

[ohbus]

We need to use the @ControllerAdvice annotation or the @RestControllerAdvice

This was already implemented to check some functionalities, which will be removed in the final version.

Also, remember to add Unit tests for your code.

[SivaTharun]

@ohbus please check the unit tests added to the change

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[ohbus]

Fix the Static Errors reported by Codacy.

[ohbus]

No need to add the JUnit dependency as it is already there.

Please use Junit5/Jupiter engine for writing the test cases.