Validate default licensing term setting

[Ramarti]

Description and context

Even if this method is restricted, we can add some checks

function setDefaultLicenseTerms(address newLicenseTemplate, uint256 newLicenseTermsId) external restricted {
        LicenseRegistryStorage storage $ = _getLicenseRegistryStorage();
        $.defaultLicenseTemplate = newLicenseTemplate;
        $.defaultLicenseTermsId = newLicenseTermsId;
    }

Suggested solution

Add verification (registered template, check that the terms id exists)

Definition of done

Test case, code merged