got rid of fixed seed after modifying tolerance values

tests/python/unittest/test_optimizer.py

@@ -512,7 +512,10 @@ def update(self, index, weight, grad, state):
         prev_v[:] = v_t
         prev_z[:] = z_t
 
-@with_seed(0)
+# @mseth10: Getting rid of fixed seed. Flakiness was reproduced on GPU.
+# rtol and atol increased to 10x their default values to resolve it.
+# can be tracked at /~https://github.com/apache/incubator-mxnet/issues/11735
+@with_seed()
 def test_ftml():
     opt1 = PyFTML
     opt2 = mx.optimizer.FTML
@@ -534,7 +537,7 @@ def test_ftml():
                             kwarg.update(cg_option)
                             kwarg.update(rg_option)
                             kwarg.update(wd_option)
-                            compare_optimizer(opt1(**kwarg), opt2(**kwarg), shape, dtype)
+                            compare_optimizer(opt1(**kwarg), opt2(**kwarg), shape, dtype, rtol=1e-3, atol=1e-4)
 
 
 # ADAM