Test case failing - test_timezones.py:TestTimeZones.test_normalize_tz
#### Code Sample, a copy-pastable example if possible

```
nosetests pandas/tseries/tests/test_timezones.py:TestTimeZones.test_normalize_tz

F
======================================================================
FAIL: test_normalize_tz (pandas.tseries.tests.test_timezones.TestTimeZones)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/ravikumarnimmi/work/pandas/pandas/tseries/tests/test_timezones.py", line 1398, in test_normalize_tz
    self.assertTrue(result.is_normalized)
AssertionError: False is not true

----------------------------------------------------------------------
Ran 1 test in 0.026s

FAILED (failures=1)
```
#### Expected Output
#### output of `pd.show_versions()`

```
INSTALLED VERSIONS
------------------
commit: f7528866e07048f051f46f621ca76947730c7d32
python: 3.5.1.final.0
python-bits: 64
OS: Darwin
OS-release: 15.5.0
machine: x86_64
processor: i386
byteorder: little
LC_ALL: en_US.UTF-8
LANG: en_US.UTF-8

pandas: 0.18.1+129.gf752886
nose: 1.3.7
pip: 8.1.2
setuptools: 23.0.0
Cython: 0.24
numpy: 1.11.0
scipy: None
statsmodels: None
xarray: None
IPython: 4.2.0
sphinx: None
patsy: None
dateutil: 2.5.3
pytz: 2016.4
blosc: None
bottleneck: None
tables: None
numexpr: None
matplotlib: None
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: None
pymysql: None
psycopg2: None
jinja2: None
boto: None
pandas_datareader: None
```
