fixing the cfn nag issues

Author: hnishar

Diff for: source/patterns/@aws-solutions-constructs/aws-dynamodb-stream-lambda/test/integ.existing-table.expected.json

@@ -15,9 +15,12 @@
             "AttributeType": "S"
           }
         ],
-        "ProvisionedThroughput": {
-          "ReadCapacityUnits": 5,
-          "WriteCapacityUnits": 5
+        "BillingMode": "PAY_PER_REQUEST",
+        "PointInTimeRecoverySpecification": {
+          "PointInTimeRecoveryEnabled": true
+        },
+        "SSESpecification": {
+          "SSEEnabled": true
         },
         "StreamSpecification": {
           "StreamViewType": "NEW_AND_OLD_IMAGES"

Diff for: source/patterns/@aws-solutions-constructs/aws-dynamodb-stream-lambda/test/integ.existing-table.ts

@@ -23,6 +23,9 @@ const app = new App();
 const stack = new Stack(app, generateIntegStackName(__filename));
 
 const table = new dynamodb.Table(stack, 'mytable', {
+  billingMode: dynamodb.BillingMode.PAY_PER_REQUEST,
+  encryption: dynamodb.TableEncryption.AWS_MANAGED,
+  pointInTimeRecovery: true,
   partitionKey: {
     name: 'id',
     type: dynamodb.AttributeType.STRING