ERP5Type/runUnitTest: Support ipython-8.0 or above.

  API changed for Pdb() call after 8.0.0rc1 release.

product/ERP5Type/tests/runUnitTest.py

@@ -483,7 +483,11 @@ class DebugTestResult:
       import IPython
       try:
         IPython.InteractiveShell()
-        p = IPython.core.debugger.Pdb(color_scheme='Linux')
+        # color scheme isnt present ipython-8.0 or above.
+        if IPython.release.version >= "8.0.0":
+          p = IPython.core.debugger.Pdb()
+        else:
+          p = IPython.core.debugger.Pdb(color_scheme='Linux')
       except AttributeError: # for ipython-0.10 or before
         IPython.Shell.IPShell(argv=[])
         p = IPython.Debugger.Pdb(color_scheme=__IPYTHON__.rc.colors)