Actors in TMap Blueprint Properties are not copied properly for PIE

Actors that reside in TMap blueprint variables refer to the Editor actors not the copied UEDPIE actors (that we'd expect) when accessed in PIE. This is not the case in standalone; this only occurs for PIE.

Confirmed in Main CL 4329255

Example project available on UDN (too large for JIRA)

1. Create a TMap of Actor Pointers
2. Pass an instance of this struct  to a blueprint function that printed out each Actor's name along with its owning world's type
3. PIE and watch output

Result: The third line of the blueprint struct (which corresponds to the Actor in the TMap) reports that its WorldType is 2