Parser should not load DataInputSchema external files

[ricardozanini]

What happened:

Given the context:

dataInputSchema:
    schema: myfile.json

The parser would try to read the file and add the object to the schema attribute. But this is not the responsibility of this SDK, but the underlying runtime.

What you expected to happen:
The parser returns the schema, the file name, and the path instead.

How to reproduce it:
Just try to parse a workflow with a schema.

Anything else we need to know?:

Environment:

• Specification version used:

• Go version: