Revert 833d426da8e4b049277ca9847830f6e6beee40c3
https://review.opendev.org/#/c/667022 introduced a regression in the
overrides functionality, which caused the corresponding gate test to
fail. This "fixed" a problem by breaking the override capability.
This patchset reverts the previous to restore override functionality and
make gates green again. Deep copy is added in order to resolve the
original problem that 667022 attempted to resolve.
Change-Id: I6c052c0fabe0067612d6a3d9d3bfac4df59202d7
ab8c81f2ee