BUG: SparseSeries constructor ignores input data name
When constructing `Series` from `Series`, name attribute is preserved otherwise specified.

```
import pandas as pd
s = pd.Series([1, 2, 3], name='a')
pd.Series(s)
#0    1
#1    2
#2    3
# Name: a, dtype: int64

pd.Series(s, name='x')
#0    1
#1    2
#2    3
# Name: x, dtype: int64
```

But `SparseSeries` doesn't preserve its name.

```
s = pd.SparseSeries([1, 2, 3], name='a')
pd.SparseSeries(s)
#0    1
#1    2
#2    3
# dtype: int64
# BlockIndex
# Block locations: array([0], dtype=int32)
# Block lengths: array([3], dtype=int32)
```
