[Storage] Fixed a sample script issue of set management policy with json (#13201)

Author: blueww

src/Storage/Storage.Management/ChangeLog.md

@@ -27,6 +27,8 @@
 * Changed the output of get/set Container/Share/Queue/Table access policy cmdlet, by change the child property Permission type from enum to String
     -  `Get-AzStorageContainerStoredAccessPolicy`
     -  `Set-AzStorageContainerStoredAccessPolicy`
+* Fixed a sample script issue of set management policy with json
+    -  `Set-AzStorageAccountManagementPolicy`
 
 ## Version 2.7.0
 * Supported enable/disable/get share soft delete properties on file Service of a Storage account

src/Storage/Storage.Management/Models/PSDataPolicy.cs

@@ -263,6 +263,9 @@ public class PSDateAfterModification
     {
         public int DaysAfterModificationGreaterThan { get; set; }
 
+        public PSDateAfterModification()
+        { }
+
         public PSDateAfterModification(int daysAfterModificationGreaterThan)
         {
             this.DaysAfterModificationGreaterThan = daysAfterModificationGreaterThan;
@@ -285,6 +288,9 @@ public class PSDateAfterCreation
     {
         public int DaysAfterCreationGreaterThan { get; set; }
 
+        public PSDateAfterCreation()
+        { }
+
         public PSDateAfterCreation(int daysAfterCreationGreaterThan)
         {
             this.DaysAfterCreationGreaterThan = daysAfterCreationGreaterThan;

src/Storage/Storage.Management/help/Set-AzStorageAccountManagementPolicy.md

@@ -141,17 +141,17 @@ This command first create 2 ManagementPolicy rule objects, then creates or updat
 ```
 PS C:\>Set-AzStorageAccountManagementPolicy -ResourceGroupName "myresourcegroup" -AccountName "mystorageaccount" -Policy (@{
     Rules=(@{
-        Enabled="true";
+        Enabled=$true;
         Name="Test";
         Definition=(@{
             Actions=(@{
                 BaseBlob=(@{
-                    TierToCool=30;
-                    TierToArchive=50;
-                    Delete=100;
+                    TierToCool=@{DaysAfterModificationGreaterThan=30};
+                    TierToArchive=@{DaysAfterModificationGreaterThan=50};
+                    Delete=@{DaysAfterModificationGreaterThan=100};
                 });
                 Snapshot=(@{
-                    Delete=100
+                    Delete=@{DaysAfterCreationGreaterThan=100};
                 });
             });
             Filters=(@{
@@ -161,12 +161,12 @@ PS C:\>Set-AzStorageAccountManagementPolicy -ResourceGroupName "myresourcegroup"
         })
     },
     @{
-        Enabled="false";
+        Enabled=$false;
         Name="Test2";
         Definition=(@{
             Actions=(@{
                 BaseBlob=(@{
-                    TierToCool=80;
+                    TierToCool=@{DaysAfterModificationGreaterThan=80};
                 });
             });
             Filters=(@{
@@ -217,7 +217,7 @@ Rules              : [
                                             }
                          },
                          {
-                             "Enabled":  true,
+                             "Enabled":  false,
                              "Name":  "Test2",
                              "Definition":  {
                                                 "Actions":  {