fix 3DLoMatch test trigger

[Shi-Qi-Li]

Hi @HpWang-whu,
Thanks for open source the code. But there may be a small bug in Test_cycle.py

SGHR/Test_cycle.py

Lines 210 to 213 in fdfb081

	def run(self):
	self.run_onedatasets(self.datasets)
	if self.datasets['wholesetname'] is '3dmatch':
	self.run_onedatasets_givengraph(self.datasetsLo)

Here is is used to trigger the 3DLoMatch test, however is checks for identity - if the two variables point to the exact same object. Since self.datasets['wholesetname'] and 3dmatch are different objects, the 3DLoMatch test will not executed. Simply use == to replace is will fix this issue.

[HpWang-whu]

Thanks for pointing out the error!