TestPeriodIndex.test_resample_empty_dataframe is failed when I pass kwargs to Resampler._groupby_and_aggregate

[discort]

Code Sample, a copy-pastable example if possible

code diff to reproduce the issue

diff --git a/pandas/core/resample.py b/pandas/core/resample.py
index 4a3625b2d..c82382f96 100644
--- a/pandas/core/resample.py
+++ b/pandas/core/resample.py
@@ -1043,7 +1043,7 @@ class PeriodIndexResampler(DatetimeIndexResampler):

         if is_subperiod(ax.freq, self.freq):
             # Downsampling
-            return self._groupby_and_aggregate(how, grouper=self.grouper)
+            return self._groupby_and_aggregate(how, grouper=self.grouper, **kwargs)
         elif is_superperiod(ax.freq, self.freq):
             if how == 'ohlc':
                 # GH #13083
@@ -1051,7 +1051,7 @@ class PeriodIndexResampler(DatetimeIndexResampler):
                 # for pure aggregating/reducing methods
                 # OHLC reduces along the time dimension, but creates multiple
                 # values for each period -> handle by _groupby_and_aggregate()
-                return self._groupby_and_aggregate(how, grouper=self.grouper)
+                return self._groupby_and_aggregate(how, grouper=self.grouper, **kwargs)
             return self.asfreq()
         elif ax.freq == self.freq:
             return self.asfreq()

Problem description

During work on the solution of #15023 I found that when I pass kwargs to _groupby_and_aggregate the TestPeriodIndex::test_resample_empty_dataframe is failed.

@jreback suggested to create a separate issue for that here

trace:

self = <pandas.core.groupby.generic.DataFrameGroupBy object at 0x106674198>, func = 'var', args = (), kwargs = {'ddof': 1}

    @Appender(_apply_docs['template']
              .format(input="dataframe",
                      examples=_apply_docs['dataframe_examples']))
    def apply(self, func, *args, **kwargs):

        func = self._is_builtin_func(func)

        # this is needed so we don't try and wrap strings. If we could
        # resolve functions to their callable functions prior, this
        # wouldn't be needed
        if args or kwargs:
            if callable(func):

                @wraps(func)
                def f(g):
                    with np.errstate(all='ignore'):
                        return func(g, *args, **kwargs)
            else:
>               raise ValueError('func must be a callable if args or '
                                 'kwargs are supplied')
E               ValueError: func must be a callable if args or kwargs are supplied

Expected Output

TestPeriodIndex::test_resample_empty_dataframe shouldn't be failed cause I correctly passing kwargs to Resampler._groupby_and_aggregate.

Output of pd.show_versions()

INSTALLED VERSIONS

commit: 1ea9664
python: 3.5.3.candidate.1
python-bits: 64
OS: Darwin
OS-release: 16.7.0
machine: x86_64
processor: i386
byteorder: little
LC_ALL: en_US.UTF-8
LANG: en_US.UTF-8
LOCALE: en_US.UTF-8

pandas: 0.24.0.dev0+465.g1ea9664db.dirty
pytest: 3.3.2
pip: 18.0
setuptools: 33.1.1
Cython: 0.28.4
numpy: 1.12.0
scipy: None
pyarrow: None
xarray: None
IPython: 5.2.2
sphinx: 1.6.6
patsy: None
dateutil: 2.6.0
pytz: 2016.10
blosc: None
bottleneck: None
tables: None
numexpr: None
feather: None
matplotlib: 2.0.0
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: 0.9999999
sqlalchemy: None
pymysql: None
psycopg2: None
jinja2: 2.9.5
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: None
gcsfs: None

[discort]

Will fix, within #22304