Return all of alias' groups in the given location.

		http://www.centurylinkcloud.com/api-docs/v2/#groups-get-group

		:param alias: short code for a particular account.  If none will use account's default alias
		:param location: datacenter where group resides

def GetGroups(location=None,alias=None):
		"""Return all of alias' groups in the given location.

		http://www.centurylinkcloud.com/api-docs/v2/#groups-get-group

		:param alias: short code for a particular account.  If none will use account's default alias
		:param location: datacenter where group resides
		"""
		if alias is None:  alias = clc.v1.Account.GetAlias()
		if location is None:  location = clc.v1.Account.GetLocation()
		r = clc.v1.API.Call('post','Group/GetGroups',{'AccountAlias': alias, 'Location': location})
		for group in r['HardwareGroups']:  clc._GROUP_MAPPING[group['UUID']] = group['Name']
		if int(r['StatusCode']) == 0:  return(r['HardwareGroups'])