Fix incorrect setting of symlink_target_account
Fix incorrect setting of symlink_target_account

The value of the symlink_target_account in etag override. It was previously
being set to the object value, rather than the account value.

Change-Id: I51889d7b19370ceaa66168103cb31d27a8ee3a4a
Closes-Bug: #1829085

tipabu/swift,tipabu/swift,swiftstack/swift,swiftstack/swift,openstack/swift,tipabu/swift,openstack/swift,openstack/swift,tipabu/swift,openstack/swift,swiftstack/swift