Backported null value support for NestedMethodProperty to 7.1 (#12884)

Support for null values in NestedMethodProperty was already implemented in master branch (#11435)
This changeset includes changesets made for that.

Change-Id: I10696467f792e234326075bbcdd5aad487905a7e
Merge: no
No-op merge from origin/7.1

681864f Backported null value support for NestedMethodProperty to 7.1 (#12884)

Change-Id: I93c588fd3005250077cc7d3edcb8de26c94f9cf5