CLN: ASV HDFStore benchmark
- Ran flake8 and replaced star imports

An `HDFStore.info()` benchmark was added in #16666, but the benchmark fails (even on master). I can create a new issue for this unless there's an obvious fix I am not seeing. 

```
asv dev -b ^hdfstore_bench· Discovering benchmarks
· Running 18 total benchmarks (1 commits * 1 environments * 18 benchmarks)
[  0.00%] ·· Building for existing-py_home_matt_anaconda_envs_pandas_dev_bin_python
[  0.00%] ·· Benchmarking existing-py_home_matt_anaconda_envs_pandas_dev_bin_python
[  5.56%] ··· Running hdfstore_bench.HDF5.time_query_store_table                                       22.3ms
[ 11.11%] ··· Running hdfstore_bench.HDF5.time_query_store_table_wide                                  33.8ms
[ 16.67%] ··· Running hdfstore_bench.HDF5.time_read_store                                              11.6ms
[ 22.22%] ··· Running hdfstore_bench.HDF5.time_read_store_mixed                                        24.3ms
[ 27.78%] ··· Running hdfstore_bench.HDF5.time_read_store_table                                        16.3ms
[ 33.33%] ··· Running hdfstore_bench.HDF5.time_read_store_table_mixed                                  34.6ms
[ 38.89%] ··· Running hdfstore_bench.HDF5.time_read_store_table_wide                                   38.3ms
[ 44.44%] ··· Running hdfstore_bench.HDF5.time_store_info                                              failed
[ 44.44%] ····· Traceback (most recent call last):
                  File "/home/matt/anaconda/envs/pandas_dev/lib/python2.7/site-packages/asv/benchmark.py", line 818, in <module>
                    commands[mode](args)
                  File "/home/matt/anaconda/envs/pandas_dev/lib/python2.7/site-packages/asv/benchmark.py", line 795, in main_run
                    result = benchmark.do_run()
                  File "/home/matt/anaconda/envs/pandas_dev/lib/python2.7/site-packages/asv/benchmark.py", line 349, in do_run
                    return self.run(*self._current_params)
                  File "/home/matt/anaconda/envs/pandas_dev/lib/python2.7/site-packages/asv/benchmark.py", line 424, in run
                    samples, number = self.benchmark_timing(timer, repeat, warmup_time, number=number)
                  File "/home/matt/anaconda/envs/pandas_dev/lib/python2.7/site-packages/asv/benchmark.py", line 471, in benchmark_timing
                    timing = timer.timeit(number)
                  File "/home/matt/anaconda/envs/pandas_dev/lib/python2.7/timeit.py", line 202, in timeit
                    timing = self.inner(it, self.timer)
                  File "/home/matt/anaconda/envs/pandas_dev/lib/python2.7/timeit.py", line 100, in inner
                    _func()
                  File "/home/matt/Projects/pandas-mroeschke/asv_bench/benchmarks/hdfstore_bench.py", line 101, in time_store_info
                    self.store.info()
                  File "/home/matt/anaconda/envs/pandas_dev/lib/python2.7/site-packages/pandas/io/pytables.py", line 495, in __getattr__
                    (type(self).__name__, name))
                AttributeError: 'HDFStore' object has no attribute 'info'

[ 50.00%] ··· Running hdfstore_bench.HDF5.time_store_repr                                              46.1ms
[ 55.56%] ··· Running hdfstore_bench.HDF5.time_store_str                                               45.2ms
[ 61.11%] ··· Running hdfstore_bench.HDF5.time_write_store                                             12.5ms
[ 66.67%] ··· Running hdfstore_bench.HDF5.time_write_store_mixed                                       28.3ms
[ 72.22%] ··· Running hdfstore_bench.HDF5.time_write_store_table                                       41.2ms
[ 77.78%] ··· Running hdfstore_bench.HDF5.time_write_store_table_dc                                     329ms
[ 83.33%] ··· Running hdfstore_bench.HDF5.time_write_store_table_mixed                                 52.2ms
[ 88.89%] ··· Running hdfstore_bench.HDF5.time_write_store_table_wide                                   123ms
[ 94.44%] ··· Running hdfstore_bench.HDF5Panel.time_read_store_table_panel                             45.6ms
[100.00%] ··· Running hdfstore_bench.HDF5Panel.time_write_store_table_panel                            76.3ms
```