avoid TB on python3 due to git format string

Use RawConfigParser instead of ConfigParser to avoid...

Traceback (most recent call last):
  File "/home/sandbox/test/functional/multiproject_tests.py", line 68, in setUp
    self.create_project(TEST_PKG_1, os.path.join(self.repo_dir, 'pkg1'))
  File "/home/sandbox/test/functional/fixture.py", line 198, in create_project
    tito('tag --keep-version --debug --accept-auto-changelog')
  File "/home/sandbox/test/functional/fixture.py", line 103, in tito
    return CLI().main(argstring.split(' '))
  File "/home/sandbox/src/tito/cli.py", line 222, in main
    return module.main(argv)
  File "/home/sandbox/src/tito/cli.py", line 671, in main
    offline=self.options.offline)
  File "/home/sandbox/src/tito/tagger/main.py", line 51, in __init__
    ConfigObject.__init__(self, config=config)
  File "/home/sandbox/src/tito/config_object.py", line 38, in __init__
    config.get(section, options))
  File "/usr/lib64/python3.3/configparser.py", line 1184, in set
    super().set(section, option, value)
  File "/usr/lib64/python3.3/configparser.py", line 889, in set
    value)
  File "/usr/lib64/python3.3/configparser.py", line 399, in before_set
    "position %d" % (value, tmp_value.find('%')))
nose.proxy.ValueError: ValueError: invalid interpolation syntax in '%s (%ae)' at position 0

src/tito/cli.py

@@ -90,7 +90,7 @@ class ConfigLoader(object):
         # Load the global config. Later, when we know what tag/package we're
         # building, we may also load that and potentially override some global
         # settings.
-        config = ConfigParser()
+        config = RawConfigParser()
         config.read(filename)
 
         self._check_legacy_globalconfig(config)
@@ -492,7 +492,7 @@ class ReleaseModule(BaseCliModule):
         """
         rel_eng_dir = os.path.join(find_git_root(), "rel-eng")
         filename = os.path.join(rel_eng_dir, RELEASERS_CONF_FILENAME)
-        config = ConfigParser()
+        config = RawConfigParser()
         config.read(filename)
         return config
 

src/tito/compat.py

@@ -19,13 +19,11 @@ ENCODING = sys.getdefaultencoding()
 PY2 = sys.version_info[0] == 2
 if PY2:
     import commands
-    from ConfigParser import ConfigParser
     from ConfigParser import NoOptionError
     from ConfigParser import RawConfigParser
     from StringIO import StringIO
 else:
     import subprocess
-    from configparser import ConfigParser
     from configparser import NoOptionError
     from configparser import RawConfigParser
     from io import StringIO

test/unit/test_build_target_parser.py

@@ -12,7 +12,7 @@ class BuildTargetParserTests(unittest.TestCase):
         self.valid_branches = ["branch1", "branch2"]
 
         self.release_target = "project-x.y.z"
-        self.releasers_config = ConfigParser()
+        self.releasers_config = RawConfigParser()
         self.releasers_config.add_section(self.release_target)
         self.releasers_config.set(self.release_target, "build_targets",
                                   "branch1:project-x.y.z-candidate")