Tutorial has errors in connect-sgwserver help examples

* In Example 4: `-AccountID` without $AccountId passed to it
* In Example 3: syntax error 
* In all examples `PS C:\>` is included before what are sentences (not commands) from online help

(Also in https://github.com/ffeldhaus/StorageGRID-Webscale/blob/master/StorageGRID-Webscale-Tutorial.md#objects it appears Get-S3Objects was replaced by Get-S3Bucket -Bucket $Bucket)