Fixes battery_life attribute because sometimes the JSON return a str instead of an int

[tchellomello]

Fixes battery_life attribute because sometimes the JSON return a str instead of an int

Fixes: #91

>>>from ring_doorbell import Ring
>>>from pprint import pprint
>>>myring = Ring('user', 'pass', 'true')
>>>obj = myring.doorbells[0] #Front Door door bell
>>>pprint(vars(obj))
{'_attrs': {u'address': u'address',
            u'alerts': {u'connection': u'online'},
            u'battery_life': u'58',
            u'description': u'Front Door',
....
'_health_attrs': {u'average_signal_category': u'good',
                   u'average_signal_strength': -49,
                   u'battery_percentage': u'58',
                   u'battery_percentage_category': u'good',
                   u'battery_voltage': None,
                   u'battery_voltage_category': None,
                   u'firmware': u'Up to Date',

>>>print(obj.battery_life)
100
>>>print (obj._attrs["battery_life"])
58
>>>print(obj._health_attrs.get('battery_percentage'))
58

The issue happens when the attribute is a string

In [1]: a = u'58'

In [2]: a > 100
Out[2]: True

To fix, basically let's cast that value:

In [1]: a = u'58'

In [2]: a > 100
Out[2]: True

In [3]: int(a) > 100
Out[3]: False

[tchellomello]

@mrwhale PR created. Could you please check if that fixes the issue?

[coveralls]

Coverage remained the same at 65.854% when pulling 1536856 on fix_91 into 599b4a5 on master.

[mrwhale]

👍 boom. Thanks @tchellomello that's done the trick. Works for both classes too

>>>from ring_doorbell import Ring
>>>from ring_doorbell import RingDoorBell
>>>from pprint import pprint

>>>myring = Ring('creds', 'true')
>>>obj = myring.doorbells[1] #Front door
>>>obj2 = RingDoorBell(myring, 'Front Door')

>>>print(obj.battery_life)
57
>>>print(obj2.battery_life)
57
>>>print (obj._attrs["battery_life"])
57
>>>print (obj2._attrs["battery_life"])
57

[tchellomello]

Awesome let's commit this and then I'll submit a PR for home assistant too.