Get template by resourceId and resourceType API validation is not valid

Get template by resourceId and resourceType input validation is broken.

User should be able to get template by passing resourceId and resourceType but

1. Issue 01: It always expect resolutionKey in the request.
"message": "400 BAD_REQUEST \"Required String parameter 'resolutionKey' is not present\"",

2.Issue 02: You need artifactName along with resourceId and resourceType but current validation does not allow artifactName to pass along
You get this error when you pass artifactName after fixing issue 01.
"message": "Cause: Either retrieve resolved template using artifact name and resolution-key OR using resource-id and resource-type. \n

This needs to be fixed.