[SIGMON-557] refactor energy extraction analysis result to have type...

What was done

• address warnings while running pytest

QA

• template link to sonar issues:http://sonar/component_issues/index?id=_GROUP_%3A_ARTIFACT_#resolved%3Dfalse%7Cauthors%3D_PAIR1_%2C_PAIR2_
• code was not unit tested, because if the warning appears that means that the
• acceptance tests were written

Review objectives

• assessment of code functionality
• assessment of code quality