Update test_isna in pandas extensions

Author: drculhane

tests/pandas/extension/arkouda_array_extension.py

@@ -168,7 +168,7 @@ def test_isna(self):
         ak_data = ak.arange(10)
         arr = ArkoudaArray(ak_data)
         na = arr.isna()
-        assert ak.all(na == False)
+        assert (na == False).all()
 
     def test_isna_with_nan(self):
         from arkouda.testing import assert_equal