Enable OData instance annotation container

[xuzhg]

Short summary (3-5 sentences) describing the issue.

Assemblies affected

Which assemblies and versions are known to be affected e.g. OData ModelBuilder 1.x

Reproduce steps

• If customer can modify his model class, we can provide the OData instance annotation container. So customer can use it to define a container in his entity to hold the instance annotation.

Expected result

What would happen if there wasn't a bug.

Actual result

What is actually happening.

Additional detail

Optional, details of the root cause if known. Delete this section if you have no additional details to add.