Fixes versioning function tests with non-zero default policy

In each PUT, proxy-server will do HEAD request for container sync
and checking the object versions. This patch makes proxy-server
knows the non-zero default policy when HEADing

Change-Id: I29c5715a9dbc11d9f2ca9ccdfa7655beadf354f8
Merge "Fixes versioning function tests with non-zero default policy" into feature/ec