Remove unnecessary file

This patch removes unneccessary file:
tools/regression_tester.py

Change-Id: I2167124d18b9a24adaf7ca6ee041693486351e69

tools/regression_tester.py

@@ -1,108 +0,0 @@
-#!/usr/bin/env python
-
-# Copyright (c) 2013 OpenStack Foundation
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-
-"""Tool for checking if patch contains a regression test.
-
-By default runs against current patch but can be set to use any gerrit review
-as specified by change number (uses 'git review -d').
-
-Idea: take tests from patch to check, and run against code from previous patch.
-If new tests pass, then no regression test, if new tests fails against old code
-then either
-* new tests depend on new code and cannot confirm regression test is valid
-  (false positive)
-* new tests detects the bug being fixed (detect valid regression test)
-Due to the risk of false positives, the results from this need some human
-interpretation.
-"""
-
-import optparse
-import string
-import subprocess
-import sys
-
-
-def run(cmd, fail_ok=False):
-    print "running: %s" % cmd
-    obj = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
-                           shell=True)
-    obj.wait()
-    if obj.returncode != 0 and not fail_ok:
-        print "The above command terminated with an error."
-        sys.exit(obj.returncode)
-    return obj.stdout.read()
-
-
-def main():
-    usage = """
-    Tool for checking if a patch includes a regression test.
-
-    Usage: %prog [options]"""
-    parser = optparse.OptionParser(usage)
-    parser.add_option("-r", "--review", dest="review",
-                      help="gerrit review number to test")
-    (options, args) = parser.parse_args()
-    if options.review:
-        original_branch = run("git rev-parse --abbrev-ref HEAD")
-        run("git review -d %s" % options.review)
-    else:
-        print ("no gerrit review number specified, running on latest commit"
-               "on current branch.")
-
-    test_works = False
-
-    # run new tests with old code
-    run("git checkout HEAD^ ec2api")
-    run("git checkout HEAD ec2api/tests")
-
-    # identify which tests have changed
-    tests = run("git whatchanged --format=oneline -1 | grep \"ec2api/tests\" "
-                "| cut -f2").split()
-    test_list = []
-    for test in tests:
-        test_list.append(string.replace(test[0:-3], '/', '.'))
-
-    if test_list == []:
-        test_works = False
-        expect_failure = ""
-    else:
-        # run new tests, expect them to fail
-        expect_failure = run(("tox -epy27 %s 2>&1" % string.join(test_list)),
-                             fail_ok=True)
-        if "FAILED (id=" in expect_failure:
-            test_works = True
-
-    # cleanup
-    run("git checkout HEAD ec2api")
-    if options.review:
-        new_branch = run("git status | head -1 | cut -d ' ' -f 4")
-        run("git checkout %s" % original_branch)
-        run("git branch -D %s" % new_branch)
-
-    print expect_failure
-    print ""
-    print "*******************************"
-    if test_works:
-        print "FOUND a regression test"
-    else:
-        print "NO regression test"
-        sys.exit(1)
-
-
-if __name__ == "__main__":
-    main()