Fix Set-AzSqlDatabase no zone resilience set (#10399)

* Fix Set-AzSqlDatabase no zone resilience set

Author: emgu-ms

src/Sql/Sql/ChangeLog.md

@@ -19,6 +19,7 @@
 -->
 ## Upcoming Release
 * Added support for database ReadReplicaCount.
+* Fixed Set-AzSqlDatabase when zone redundancy not set
 
 ## Version 2.0.0
 * Added support for restore of dropped databases on Managed Instances.

src/Sql/Sql/Database/Cmdlet/SetAzureSqlDatabase.cs

@@ -262,10 +262,7 @@ protected override IEnumerable<AzureSqlDatabaseModel> ApplyUserInputToModel(IEnu
                 ElasticPoolName = ElasticPoolName,
                 Location = model.FirstOrDefault().Location,
                 ReadScale = ReadScale,
-                ZoneRedundant =
-                       ZoneRedundant != null
-                           ? (bool?)ZoneRedundant.ToBool()
-                           : null,
+                ZoneRedundant = MyInvocation.BoundParameters.ContainsKey("ZoneRedundant") ? (bool?)ZoneRedundant.ToBool() : null,
                 LicenseType = LicenseType ?? model.FirstOrDefault().LicenseType, // set to original license type
                 AutoPauseDelayInMinutes = this.IsParameterBound(p => p.AutoPauseDelayInMinutes) ? AutoPauseDelayInMinutes : (int?)null,
                 MinimumCapacity = this.IsParameterBound(p => p.MinimumCapacity) ? MinimumCapacity : (double?)null,