Merge pull request #3730 from tchaumeny/test_suite_reorder

from django.core.exceptions import ImproperlyConfigured

from django.test import SimpleTestCase, TestCase

from django.test.utils import setup_test_environment, teardown_test_environment

from django.utils.datastructures import OrderedSet

class DiscoverRunner(object):

    """

    class_count = len(classes)

    suite_class = type(suite)

    bins = [suite_class() for i in range(class_count + 1)]

    bins = [OrderedSet() for i in range(class_count + 1)]

    partition_suite(suite, classes, bins, reverse=reverse)

    for i in range(class_count):

        bins[0].addTests(bins[i + 1])

    return bins[0]

    reordered_suite = suite_class()

    for i in range(class_count + 1):

        reordered_suite.addTests(bins[i])

    return reordered_suite

def partition_suite(suite, classes, bins, reverse=False):

        else:

            for i in range(len(classes)):

                if isinstance(test, classes[i]):

                    if test not in bins[i]:

                        bins[i].addTest(test)

                    bins[i].add(test)

                    break

            else:

                if test not in bins[-1]:

                    bins[-1].addTest(test)

                bins[-1].add(test)

def setup_databases(verbosity, interactive, keepdb=False, **kwargs):