Java 17 migration

Description:

Migration from Java 8 to Java 17.

How to test:

Via Unit and Integration tests.

Changes include:

• Breaking change (a change that is not backward-compatible and/or changes current functionality).

Changes in:

• Common code

Dev Checklist:

• Added Unit Tests, wherever applicable.
• Updated the Readme, if applicable.
• Existing Tests pass
• Verified functionality locally
• Self Reviewed my code for formatting and complex business logic.

Other comments:

• Upgraded 'lombok' & 'jacoco' plugin version to generate code-coverage report
• Changed TestRunner 'PowerMockRunner' to 'MockitoJUnitRunner'
• Removed 'powermock-api-mockito2' & 'powermock-module-junit4' dependencies
• Updated existing testcases to use junit-5