Shared schema for all Entities not supported

The entities defined in "yamlparser.go" do not support the fields declared in the OpenWhisk Packaging specification that are listed under the section "Shared schema for all Entities".

The entities that need to support these field/keys include (all or in part):
- Action
- Feed
- Composition

If this is too confusing, we can in-line all parameters in all entities...

Start in yamlparser.go and compare the Action, Feed, and Composition entities with the OpenWhisk Packaging specification's “Shared schema for all Entities” section. Identify which shared fields are missing and verify that the affected entities support them; done means the required shared schema is represented for all applicable entities.

Written by the indexing model from the issue text.