Openapi schema fixes

[luksa]

This fixes two things:

• removes "Object" suffix from some type names
• points the JSONSchema type definition to http://json-schema.org/draft-04/schema instead of it it being an arbitrary object (type: object)

I removed the "Object" suffix because it is unnecessary and makes the naming of these types inconsistent with other type definitions in the schema. For example, in the spec document, we call it "Plan Object", but in the OpenAPI schema, we simply call it Plan.

The following type definitions contained the "Object" suffix:

• SchemasObject
• ServiceInstanceSchemaObject
• ServiceBindingSchemaObject
• JSONSchemaObject

[cfdreddbot]

Hey luksa!

Thanks for submitting this pull request! I'm here to inform the recipients of the pull request that you and the commit authors have already signed the CLA.

[n3wscott]

LGTM

[pmorie]

cc @spadgett

[pmorie]

LGTM

[duglin]

LGTM

[mattmcneeney]

LGTM