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

Author: littlespex

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

@@ -425,7 +425,7 @@ describe('CmcdModel', function () {
                     return e.split('=')[0]
                 })).to.not.include('dl');
                 expect(headers[STATUS_HEADER_NAME]).to.be.undefined;
-                expect(headers[SESSION_HEADER_NAME]).to.be.empty;
+                expect(headers[SESSION_HEADER_NAME]).to.be.undefined;
             });
 
             it('getHeadersParameters() should return no parameters if enabled keys is empty', function () {
@@ -540,7 +540,6 @@ describe('CmcdModel', function () {
                             type: MEDIA_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);