Unnecessary bare except at class Block, function interpolate hides actual error
#### Code Sample, a copy-pastable example if possible

```python
# Minimal example:
import pandas as pd
df = pd.Series([0,1,pd.np.nan,3,4])
df.interpolate(method='spline')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "D:\venvs\food_and_drinking\lib\site-packages\pandas\core\generic.py", line 6034, in interpolate
    **kwargs)
  File "D:\venvs\food_and_drinking\lib\site-packages\pandas\core\internals.py", line 3702, in interpolate
    return self.apply('interpolate', **kwargs)
  File "D:\venvs\food_and_drinking\lib\site-packages\pandas\core\internals.py", line 3581, in apply
    applied = getattr(b, f)(**kwargs)
  File "D:\venvs\food_and_drinking\lib\site-packages\pandas\core\internals.py", line 1168, in interpolate
    raise ValueError("invalid method '{0}' to interpolate.".format(method))
ValueError: invalid method 'spline' to interpolate.
```
##### Expected output
```python
ValueError: You must specify the order of the spline or polynomial.
```

#### Problem description

If interpolation parameter not specified, it raises an error, which states invalid method
internals.py:1152:1155
        try:
            m = missing.clean_interp_method(method, **kwargs)
        except:
            m = None

If there is no such try/except block around the missing.clean_interp_method function call, we would get the proper exception from mising.py/clean_interp_method.

Pandas version: 0.23.4