Returns group object for datacenter root group.

		>>> clc.v2.Datacenter().RootGroup()
		<clc.APIv2.group.Group object at 0x105feacd0>
		>>> print _
		WA1 Hardware

def RootGroup(self):
		"""Returns group object for datacenter root group.

		>>> clc.v2.Datacenter().RootGroup()
		<clc.APIv2.group.Group object at 0x105feacd0>
		>>> print _
		WA1 Hardware

		"""

		return(clc.v2.Group(id=self.root_group_id,alias=self.alias,session=self.session))