[LU-3589] Extract changelog fields by name

• Type: Improvement
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.4.1, Lustre 2.5.0
• Labels: mn1 mq313
• Assignee: James Nunez (Inactive)
• Reporter: Henri Doreau (Inactive)

Description

Make testing more robust by extracting changelog record fields by name where applicable instead of using their position in the list.