Add exception for deprecated ScatterTable method usage

Author: wshanks

test/base.py

@@ -103,6 +103,16 @@ def setUpClass(cls):
             # warnings. In that case, the test should catch the warning
             # assertWarns or warnings.catch_warnings.
             warnings.filterwarnings("error", module="qiskit_experiments")
+            # Ideally, changes introducing pending deprecations should include
+            # alternative code paths and not need to generate warnings in the
+            # tests but until this exception is necessary until the use of the
+            # deprecated ScatterTable methods are removed.
+            warnings.filterwarnings(
+                "default",
+                module="qiskit_experiments",
+                message=".*Curve data uses dataframe representation.*",
+                category=PendingDeprecationWarning,
+            )
 
             # Some functionality may be deprecated in Qiskit Experiments. If
             # the deprecation warnings aren't filtered, the tests will fail as