Investigate the sizeCache changes with updated protobuf dependency

[timflannagan]

Investigate the sizeCache changes with updated protobuf dependency. We needed to change unit tests that were previously using To(Equal(...)) gomega matcher semantics and needed to be updated to our custom matcher library or changed to To(BeEquivalentTo(...)) to avoid a deep equality check
Previously sizeCache was 0 and the newer protobuf dependency had sizeCache set to 1 (or vice-versa)