fix: set useDefaultIdType while discovering models

[aaqilniz]

The juggler changes the type of the id to the default type from the connector except useDefaultIdType is set to false.
This PR enables the discoverer to add this flag when the type is available in the property.

Checklist

• Sign off your commits with DCO (Developer Certificate of Origin)
• npm test passes on your machine
• New tests added or existing tests modified to cover all changes
• Code conforms with the style guide
• Commit messages are following our guidelines

[coveralls]

Pull Request Test Coverage Report for Build 13883869751

Details

• 1 of 2 (50.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.02%) to 84.69%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
lib/datasource.js	1	2	50.0%

Totals
Change from base Build 13880427160:	-0.02%
Covered Lines:	7279
Relevant Lines:	8286

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💛 - Coveralls