test(columnDesc): add description to column field in DocApi server test

test/server/lib/DocApi.ts

@@ -496,6 +496,7 @@ function testDocApi() {
               isFormula: false,
               formula: '',
               label: 'A',
+              description: '',
               untieColIdFromLabel: false,
               summarySourceCol: 0,
               displayCol: 0,
@@ -516,6 +517,7 @@ function testDocApi() {
               isFormula: false,
               formula: '',
               label: 'B',
+              description: '',
               untieColIdFromLabel: false,
               summarySourceCol: 0,
               displayCol: 0,
@@ -536,6 +538,7 @@ function testDocApi() {
               isFormula: false,
               formula: '',
               label: 'C',
+              description: '',
               untieColIdFromLabel: false,
               summarySourceCol: 0,
               displayCol: 0,
@@ -556,6 +559,7 @@ function testDocApi() {
               isFormula: true,
               formula: '',
               label: 'D',
+              description: '',
               untieColIdFromLabel: false,
               summarySourceCol: 0,
               displayCol: 0,
@@ -576,6 +580,7 @@ function testDocApi() {
               isFormula: true,
               formula: '$A.upper()',
               label: 'E',
+              description: '',
               untieColIdFromLabel: false,
               summarySourceCol: 0,
               displayCol: 0,