added testcase for unpack and written new xml

coverage.xml

sonar-scanner-cli-6.2.1.4610-linux-x64.zip

...ache__/test_excel_operations.cpython-310-pytest-8.3.5.pyc

...__pycache__/test_unpack_data.cpython-310-pytest-8.3.5.pyc

tests/test_excel_operations.py

tests/test_unpack_data.py

utils/__pycache__/payload_mapping.cpython-310.pyc

utils/__pycache__/unpack_data.cpython-310.pyc

utils/payload_mapping.py

utils/unpack_data.py