import: always load testcommon from localmodule

Having this import before sys.path.insert() made it load testcommon from
the Debian package.

tests/import_subcommand.TestCase

@@ -14,7 +14,6 @@ from unittest import mock
 from pathlib import Path
 
 import requests
-from testcommon import TmpCwd, mkdtemp
 
 localmodule = Path(__file__).resolve().parent.parent
 print('localmodule: ' + str(localmodule))
@@ -25,6 +24,7 @@ import fdroidserver.common
 import fdroidserver.import_subcommand
 import fdroidserver.metadata
 from fdroidserver.exception import FDroidException
+from testcommon import TmpCwd, mkdtemp
 
 
 class ImportTest(unittest.TestCase):

tests/lint.TestCase

@@ -10,7 +10,6 @@ import sys
 import tempfile
 import unittest
 from pathlib import Path
-from testcommon import mkdtemp
 
 localmodule = Path(__file__).resolve().parent.parent
 print('localmodule: ' + str(localmodule))
@@ -21,6 +20,7 @@ import fdroidserver.common
 import fdroidserver.lint
 import fdroidserver.metadata
 from fdroidserver.common import CATEGORIES_CONFIG_NAME
+from testcommon import mkdtemp
 
 
 class LintTest(unittest.TestCase):

tests/main.TestCase

@@ -8,7 +8,6 @@ import textwrap
 import unittest
 import tempfile
 from unittest import mock
-from testcommon import TmpCwd, TmpPyPath
 
 localmodule = os.path.realpath(
     os.path.join(os.path.dirname(inspect.getfile(inspect.currentframe())), '..')
@@ -19,6 +18,7 @@ if localmodule not in sys.path:
 
 from fdroidserver import common
 import fdroidserver.__main__
+from testcommon import TmpCwd, TmpPyPath
 
 
 class MainTest(unittest.TestCase):

tests/metadata.TestCase

@@ -15,8 +15,6 @@ from collections import OrderedDict
 from pathlib import Path
 from unittest import mock
 
-from testcommon import TmpCwd, mkdtemp
-
 localmodule = Path(__file__).resolve().parent.parent
 print('localmodule: ' + str(localmodule))
 if localmodule not in sys.path:
@@ -26,6 +24,7 @@ import fdroidserver
 from fdroidserver import metadata
 from fdroidserver.exception import MetaDataException
 from fdroidserver.common import DEFAULT_LOCALE
+from testcommon import TmpCwd, mkdtemp
 
 
 def _get_mock_mf(s):

tests/rewritemeta.TestCase

@@ -8,14 +8,13 @@ import tempfile
 import textwrap
 from pathlib import Path
 
-from testcommon import TmpCwd, mkdtemp
-
 localmodule = Path(__file__).resolve().parent.parent
 print('localmodule: ' + str(localmodule))
 if localmodule not in sys.path:
     sys.path.insert(0, str(localmodule))
 
 from fdroidserver import common, metadata, rewritemeta
+from testcommon import TmpCwd, mkdtemp
 
 
 class RewriteMetaTest(unittest.TestCase):

tests/update.TestCase

@@ -23,7 +23,6 @@ import textwrap
 from binascii import hexlify
 from datetime import datetime
 from pathlib import Path
-from testcommon import TmpCwd, mkdtemp
 from unittest import mock
 
 try:
@@ -61,6 +60,7 @@ import fdroidserver.metadata
 import fdroidserver.update
 from fdroidserver.common import CATEGORIES_CONFIG_NAME
 from fdroidserver.looseversion import LooseVersion
+from testcommon import TmpCwd, mkdtemp
 
 
 DONATION_FIELDS = ('Donate', 'Liberapay', 'OpenCollective')