Add a special judge for Az.Accounts when bump version (Azure#12357)

* Add a special judge for Az.Accounts when bump version

Author: chenlei-yang

tools/VersionController/Models/VersionBumper.cs

@@ -126,6 +126,15 @@ private string GetBumpedVersion()
                 {
                     versionBump = Version.MINOR;
                 }
+                // for https://github.com/Azure/azure-powershell/pull/12356
+                // Because of the wrong compare script in the link above, we need to avoid the minor bump when the version of Az.Accounts is 1.9.x
+                // So we add a special judge for it when the version is 1.9.x and the expect bump type is minor, 
+                // we will change the type to patch so that it can work until 1.9.9.Once the version is greater or equal than 2.0.0
+                // this special judge will not works anymore.
+                if (splitVersion[0] == 1 && splitVersion[1] == 9 && versionBump == Version.MINOR)
+                {
+                    versionBump = Version.PATCH;
+                }
             }
 
             // PATCH update for preview modules (0.x.x or x.x.x-preview)