Merge pull request #6425 from ahamad-MS/AzureRm.EventGrid.BugFixes.SubjectParameters

Remove ValidateNotNullOrEmpty validation conditions for SubjectBeginsWith/SubjectEndsWith in Update-AzureRmEventGridSubscription cmdlet to allow changing these parameters to empty string if needed

Author: Maddie Clayton

src/ResourceManager/EventGrid/ChangeLog.md

@@ -18,6 +18,7 @@
         - Additional information about change #1
 -->
 ## Current Release
+* Remove ValidateNotNullOrEmpty validation conditions for SubjectBeginsWith/SubjectEndsWith in Update-AzureRmEventGridSubscription cmdlet to allow changing these parameters to empty string if needed.
 
 ## Version 0.3.3
 * Set minimum dependency of module to PowerShell 5.0

src/ResourceManager/EventGrid/Commands.EventGrid/EventSubscription/UpdateAzureEventGridSubscription.cs

@@ -146,7 +146,6 @@ public class UpdateAzureEventGridSubscription : AzureEventGridCmdletBase
             Mandatory = false,
             HelpMessage = EventGridConstants.SubjectBeginsWithHelp,
             ParameterSetName = EventSubscriptionInputObjectParameterSet)]
-        [ValidateNotNullOrEmpty]
         public string SubjectBeginsWith { get; set; }
 
         [Parameter(
@@ -165,7 +164,6 @@ public class UpdateAzureEventGridSubscription : AzureEventGridCmdletBase
             Mandatory = false,
             HelpMessage = EventGridConstants.SubjectEndsWithHelp,
             ParameterSetName = EventSubscriptionInputObjectParameterSet)]
-        [ValidateNotNullOrEmpty]
         public string SubjectEndsWith { get; set; }
 
         [Parameter(