Method API: addPermissionToSpace(String permission, String entityName, RemoteSpace remoteSpace)
Method Description: Add a given permission for a particular group/user having name entityName to the given space.
*param permission is the Permission that is to be added to the space
*param entityName is either a group or a user name
*param remoteSpace is the remote space for which the given permission is to be added for the given group/user