Upgrade to new sentry SDK for python

[maxious]

We started getting errors and sentry stopped reporting CKAN exceptions:

<urlopen error [Errno 104] Connection reset by peer> (url: https://sentry/api/2/store/)
Traceback (most recent call last):
  File "/usr/lib/ckan/default/lib64/python2.7/dist-packages/raven/transport/threaded.py", line 165, in send_sync
    super(ThreadedHTTPTransport, self).send(url, data, headers)
  File "/usr/lib/ckan/default/lib64/python2.7/dist-packages/raven/transport/http.py", line 43, in send
    ca_certs=self.ca_certs,
  File "/usr/lib/ckan/default/lib64/python2.7/dist-packages/raven/utils/http.py", line 66, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib64/python2.7/urllib2.py", line 429, in open
    response = self._open(req, data)
  File "/usr/lib64/python2.7/urllib2.py", line 447, in _open
    '_open', req)
  File "/usr/lib64/python2.7/urllib2.py", line 407, in _call_chain
    result = func(*args)
  File "/usr/lib/ckan/default/lib64/python2.7/dist-packages/raven/utils/http.py", line 46, in https_open
    return self.do_open(ValidHTTPSConnection, req)
  File "/usr/lib64/python2.7/urllib2.py", line 1200, in do_open
    raise URLError(err)
URLError: <urlopen error [Errno 104] Connection reset by peer>

Upgrading from raven to the new sentry SDK for python https://github.com/getsentry/sentry-python resumed exceptions being reported.

[RemiDesgrange]

Can this PR be merged ? Thanks

[RemiDesgrange]

Can you bump it to 0.9

[RemiDesgrange]

does

sentry_sdk.init(
    dsn=config.get('sentry.dsn'),
    integrations=[FlaskIntegration(), RqIntegraton()]
)

not work ?