DATAMONGO-1012 - ID initialization for lazy DBRef proxies.

HACK STATE - Do not merge!

We now initialize the ID property for proxies created for lazily initialized DBRefs. This will allow the lookup of ID properties for types that use field access without initializing the entire proxy.
DATAMONGO-1012 - ID initialization for lazy DBRef proxies.

Added test case for eagerly resolving id property with property access.
The test fails since we don't support the eager resolving if an id property for AccessType property yet.