Modified attemptChange to update state.oldValues even when the newValue
is the same as the old value.
Added MH test with burn-in and interval
Merge branch 'DEV2.2.1' of https://github.com/gtakata/figaro into gtakata-DEV2.2.1
Merge branch 'gtakata-DEV2.2.1' into DEV2.2.1