Merge pull request #5542 from Azure/dend-patch-2

Update appveyor.yml

Author: twitchax

appveyor.yml

@@ -8,6 +8,7 @@ environment:
     secure: VMFbecLLHzDq/09YDPbcM0VDDSwwgY57vr5GXK6cZZ4Ti/Xs5RZoylzV8MMr1350
 
 before_build:
+  - ps: Get-Module -ListAvailable | where-Object {$_.Name -like “Azure*”} | Uninstall-Module -Verbose
   - ps: Install-Module -Name PowerShellGet -Force
   - ps: Install-Module -Name SplitPipeline -Force
   - ps: Install-Module -Name platyPS -Force