Revert "MRP-2021 mdd: credits for changelog calculation"

This reverts commit 75ae17dd46946093520d8be9a29bcd0f4dac549e.
Revert "LU-4279 mdd: Fixed OBF of the FS .lustre"

This reverts commit 86572ae9c5303d058ddc3ed45a8dac2a20ee4e66.
Revert "LU-3245 mdd: Fixed OBF of the FS root"

This reverts commit cd89e0cd782a8b8bc39d0af985791ce7f9c65631.
Revert "LU-2792 fld: add dot_seq into in_fldb check"

This reverts commit 76086199ecba36c11f801e0b991e5790664648b3.