fix(aws-batch): computeResourcesTags use tag map

Use key-value map of tags for `ComputeResources.computeResourcesTags`.

Previously used type `Tag` disallowed adding multiple tags.

**Fixes aws#7350**

BREAKING CHANGE: Changed type of `ComputeResources.computeResourcesTags`
from `Tag` to map (details in fixed issue).

Author: Radek Smogura

packages/@aws-cdk/aws-batch/lib/compute-environment.ts

@@ -1,6 +1,6 @@
 import * as ec2 from '@aws-cdk/aws-ec2';
 import * as iam from '@aws-cdk/aws-iam';
-import { Construct, IResource, Resource, Stack, Tag } from '@aws-cdk/core';
+import { Construct, IResource, Resource, Stack } from '@aws-cdk/core';
 import { CfnComputeEnvironment } from './batch.generated';
 
 /**
@@ -210,7 +210,9 @@ export interface ComputeResources {
    *
    * @default - no tags will be assigned on compute resources.
    */
-  readonly computeResourcesTags?: Tag;
+  readonly computeResourcesTags?: {
+    [key: string]: string
+  };
 }
 
 /**

packages/@aws-cdk/aws-batch/test/compute-environment.test.ts

@@ -161,7 +161,10 @@ describe('Batch Compute Evironment', () => {
         computeResources: {
           allocationStrategy: batch.AllocationStrategy.BEST_FIT,
           vpc,
-          computeResourcesTags: new cdk.Tag('foo', 'bar'),
+          computeResourcesTags: {
+            'Name': 'AWS Batch Instance - C4OnDemand',
+            'Tag Other': 'Has other value',
+          },
           desiredvCpus: 1,
           ec2KeyPair: 'my-key-pair',
           image: new ecs.EcsOptimizedAmi({
@@ -244,10 +247,8 @@ describe('Batch Compute Evironment', () => {
             },
           ],
           Tags: {
-            key: 'foo',
-            props: {},
-            defaultPriority: 100,
-            value: 'bar',
+            'Name': 'AWS Batch Instance - C4OnDemand',
+            'Tag Other': 'Has other value',
           },
           Type: 'EC2',
         },

packages/@aws-cdk/aws-batch/test/integ.batch.expected.json

@@ -859,6 +859,9 @@
               "Ref": "vpcPrivateSubnet3Subnet985AC459"
             }
           ],
+          "Tags": {
+            "compute-env-tag": "123XYZ"
+          },
           "Type": "EC2"
         },
         "State": "ENABLED"
@@ -1351,4 +1354,4 @@
       }
     }
   }
-}
+}

packages/@aws-cdk/aws-batch/test/integ.batch.ts

@@ -43,6 +43,9 @@ new batch.JobQueue(stack, 'batch-job-queue', {
           launchTemplate: {
             launchTemplateName: launchTemplate.launchTemplateName as string,
           },
+          computeResourcesTags: {
+            'compute-env-tag': '123XYZ',
+          },
         },
       }),
       order: 2,