Fix multiple import on one line

[thopre]

Summary

Fix Flake8's E401 error (multiple imports on one line)

tests/server/db/ImportV4TestSuiteInstance.py

 # IMPORT-A-REJECT: Duplicate submission for '1'
 
 # Dump a copy of the database, so it will show up in logs.
 # RUN: sqlite3 %t.install/data/lnt.db .dump
 
 # Run consistency checks on the final database, to validate the import.
 # RUN: python %s %t.install/data/lnt.db
 
-import datetime, sys
+import datetime
+import sys
 
 import lnt.testing
 from lnt.server.config import Config
 from lnt.server.db import testsuite
 from lnt.server.db import v4db
 
 # Load the test database.
 db = v4db.V4DB("sqlite:///%s" % sys.argv[1], Config.dummy_instance())

tests/server/db/search.py

 # RUN: python %s %S
 
-import unittest, tempfile, shutil, sys, os
+import unittest
+import tempfile
+import shutil
+import sys
+import os
 import lnt.util.ImportData
 import lnt.server.instance
 from lnt.server.db.search import search
 
 
 base_path = ''
 
 

tests/testing/cPerf.py

 # RUN: python %s
 
-import unittest, sys, os, tempfile
+import unittest
+import sys
+import os
+import tempfile
 from lnt.testing.profile.perf import LinuxPerfProfile
     
 class CPerfTest(unittest.TestCase):
     def setUp(self):
         self.inputs = os.path.join(os.path.dirname(os.path.abspath(__file__)),
                                    'Inputs')
         self.fake_nm = 'python %s/fake-nm.py' % self.inputs
 

tests/testing/profilev1impl.py

 # RUN: python %s
-import unittest, logging, sys, copy, tempfile, io
+
+import unittest
+import logging
+import sys
+import copy
+import tempfile
+import io
 from lnt.testing.profile.profilev1impl import ProfileV1
 from lnt.testing.profile.profile import Profile
 
 logging.basicConfig(level=logging.DEBUG)
 
 class ProfileV1Test(unittest.TestCase):
     def setUp(self):
         self.test_data = {

tests/testing/profilev2impl.py

 # RUN: python %s
-import unittest, logging, sys, copy, tempfile, io
+
+import unittest
+import logging
+import sys
+import copy
+import tempfile
+import io
 from lnt.testing.profile.profilev2impl import ProfileV2
 from lnt.testing.profile.profilev1impl import ProfileV1
 
 
 logging.basicConfig(level=logging.DEBUG)
 
 class ProfileV2Test(unittest.TestCase):
     def setUp(self):