Fix duplicate request in group add - Bug fix

[gigacodedev]

Bug Details

In the Invoke-AddGroup function, the series of if/else statements to determine the type of group to add has a duplicate ExoRequest if the group is of type Distribution or Dynamic Distribution. The group will create, but the $GraphRequest variable will then be overwritten with the failure to create due to duplicate error from the second ExoRequest, and return an error to the front end

Fix Details

As the inner if/else statements to determine the distribution group type contain an existing ExoRequest function, remove the extra request.