[OperationalInsights] Cluster Validation change and extended error msg (Azure#17634)

* remove cmdlet validation on cluster capacity

* expand error msg and changelog update

* Update src/OperationalInsights/OperationalInsights/ChangeLog.md

Co-authored-by: Beisi Zhou <zhoubeisi@gmail.com>

Co-authored-by: Beisi Zhou <zhoubeisi@gmail.com>

Author: dabenhamMic

src/OperationalInsights/OperationalInsights/ChangeLog.md

@@ -19,6 +19,8 @@
 -->
 
 ## Upcoming Release
+* Removed capacity validation in new and update cluster cmdlets as validation exists on server side.
+* Extended error message on base class for extended information.
 * Bug fix - prevent exceptions while using StorageInsight cmdlets.
 * Bug fix - when updating a cluster, it's SKU was set even if no value was passed.
 

src/OperationalInsights/OperationalInsights/Models/PSClusterSku.cs

@@ -52,11 +52,6 @@ private void ValidateCapacity()
                 throw new PSArgumentException($"Sku name only supports: {AllowedClusterServiceTiers.CapacityReservation} ");
             }
 
-            if (this.Capacity < 1000)
-            {
-                throw new PSArgumentException("SkuCapacity need to be more than 1000 GB ");
-            }
-
             if (this.Capacity % 100 != 0)
             {
                 throw new PSArgumentException("SkuCapacity need to be multiple of 100 ");

src/OperationalInsights/OperationalInsights/OperationalInsightsBaseCmdlet.cs

@@ -68,8 +68,8 @@ protected override void WriteExceptionError(Exception exception)
             // Override the default error message so it will include information passed from Backend
             Management.OperationalInsights.Models.ErrorResponseException errorException = exception as Management.OperationalInsights.Models.ErrorResponseException;
             if (errorException != null)
-            {
-                exception = new Exception(string.Format("{0}\n{1}", errorException.Message, errorException.Response.ReasonPhrase), errorException);
+            {                
+                exception = new Exception(string.Format("{0}\n{1}\n{2}", errorException.Message, errorException.Response?.ReasonPhrase, errorException.Response?.Content), errorException);
             }
             base.WriteExceptionError(exception);
         }