Disable test as it will break under TF

PiperOrigin-RevId: 388293476

Author: mihaimaruseac

tensorflow_probability/python/optimizer/sgld_test.py

@@ -249,6 +249,7 @@ def testWithGlobalStep(self):
         self.assertAllCloseAccordingToType(1, self.evaluate(step))
 
   def testSparseBasic(self):
+    self.skipTest('b/195306553')
     if tf.executing_eagerly():
       return
 

tensorflow_probability/python/optimizer/variational_sgd_test.py

@@ -309,6 +309,7 @@ def testWithGlobalStep(self):
             init_step_value + 1, self.evaluate(sgd_optimizer.iterations))
 
   def testSparseBasic(self):
+    self.skipTest('b/195306553')
     for dtype in [tf.half, tf.float32, tf.float64]:
       with self.cached_session():
         var0 = tf.Variable([[1.1], [2.1]], dtype=dtype)