fix: update tests to account for headers being undefined instead of blank strings

Author: littlespex

test/unit/test/streaming/streaming.models.CmcdModel.js

@@ -547,31 +547,27 @@ describe('CmcdModel', function () {
                             type: INIT_SEMGENT_REQUEST_TYPE,
                         };
                         headers = cmcdModel.getHeaderParameters(request);
-                        expect(headers).to.have.property(OBJECT_HEADER_NAME);
                         expect(headers).to.have.property(REQUEST_HEADER_NAME);
                         expect(headers).to.have.property(SESSION_HEADER_NAME);
 
                         request = {
                             type: XLINK_REQUEST_TYPE,
                         };
                         headers = cmcdModel.getHeaderParameters(request);
-                        expect(headers).to.have.property(OBJECT_HEADER_NAME);
                         expect(headers).to.have.property(REQUEST_HEADER_NAME);
                         expect(headers).to.have.property(SESSION_HEADER_NAME);
 
                         request = {
                             type: MDP_REQUEST_TYPE,
                         };
                         headers = cmcdModel.getHeaderParameters(request);
-                        expect(headers).to.have.property(OBJECT_HEADER_NAME);
                         expect(headers).to.have.property(REQUEST_HEADER_NAME);
                         expect(headers).to.have.property(SESSION_HEADER_NAME);
 
                         request = {
                             type: STEERING_REQUEST_TYPE,
                         };
                         headers = cmcdModel.getHeaderParameters(request);
-                        expect(headers).to.have.property(OBJECT_HEADER_NAME);
                         expect(headers).to.have.property(REQUEST_HEADER_NAME);
                         expect(headers).to.have.property(SESSION_HEADER_NAME);