Change isNFS default from null to undefined

Issue: CLDSRV-630

Author: Seragonia

tests/unit/api/apiUtils/getReplicationInfo.js

@@ -38,7 +38,7 @@ describe('getReplicationInfo helper', () => {
             storageClass: 'awsbackend',
             role: 'arn:aws:iam::root:role/s3-replication-role',
             storageType: 'aws_s3',
-            isNFS: null,
+            isNFS: undefined,
         });
     });
 
@@ -79,7 +79,7 @@ describe('getReplicationInfo helper', () => {
             storageClass: 'awsbackend',
             role: 'arn:aws:iam::root:role/s3-replication-role',
             storageType: 'aws_s3',
-            isNFS: null,
+            isNFS: undefined,
         });
     });
 
@@ -110,7 +110,7 @@ describe('getReplicationInfo helper', () => {
             storageClass: 'awsbackend,azurebackend',
             role: 'arn:aws:iam::root:role/s3-replication-role',
             storageType: 'aws_s3,azure',
-            isNFS: null,
+            isNFS: undefined,
         });
     });
 
@@ -143,7 +143,7 @@ describe('getReplicationInfo helper', () => {
             storageClass: 'awsbackend:preferred_read,azurebackend',
             role: 'arn:aws:iam::root:role/s3-replication-role',
             storageType: 'aws_s3,azure',
-            isNFS: null,
+            isNFS: undefined,
         });
     });
 
@@ -207,7 +207,7 @@ describe('getReplicationInfo helper', () => {
             storageClass: 'awsbackend',
             role: 'arn:aws:iam::root:role/s3-replication-role',
             storageType: 'aws_s3',
-            isNFS: null,
+            isNFS: undefined,
         });
     });
 });

tests/unit/api/objectReplicationMD.js

@@ -306,7 +306,7 @@ describe('Replication object MD without bucket replication config', () => {
                 'arn:aws:iam::account-id:role/dest-resource',
             storageType: '',
             dataStoreVersionId: '',
-            isNFS: null,
+            isNFS: undefined,
         };
         const newReplicationMD = hasStorageClass ? Object.assign(replicationMD,
             { storageClass: storageClassType }) : replicationMD;
@@ -538,7 +538,7 @@ describe('Replication object MD without bucket replication config', () => {
                     role: 'arn:aws:iam::account-id:role/resource',
                     storageType,
                     dataStoreVersionId: '',
-                    isNFS: null,
+                    isNFS: undefined,
                 };
 
                 // Expected for a metadata-only replication operation (for