Improve returning of Activities and Permissions for Cmdlets supporting them

[badrogh]

Several Cmdlets can get additional details on Activities or Permissions hidden behind -Detailed parameter (performance purpose as additional API call for each object). This add the Activities and Permissions to the object as an additional Member to the Object returned.
This enhancement goal is to add another set or parameter for each additional information that would return directly the list of Activities or Permissions: e.g. a parameter named -ShowActivities to Get-CentrifyUser that would return all Activities for a given CentrifyUser object.