Ensure that we are catching/logging all exceptions about centinel

[gsathya]

(centinel)➜  centinel git:(master) ack "Exception" -A 2 centinel/
centinel/backend.py
94:        except Exception as e:
95-            logging.error("Unable to register: %s" % str(e))
96-            raise e
--
104:    except Exception, e:
105-        logging.error("Unable to create user: %s" % str(e))
106-        return
--
114:        except Exception, e:
115-            logging.error("Unable to send result file: %s" % str(e))
116-
--
129:    except Exception, e:
130-        logging.error("Unable to download experiment files %s", str(e))
131-

centinel/client.py
78:            except Exception, e:
79-                logging.error("Error in %s: %s" % (name, str(e)))
80-

centinel/experiments/tcp_connect.py
30:        except Exception as err:
31-            result["failure"] = str(err)
32-

centinel/experiments/turkey.py
44:        except Exception as err:
45-            result["blocked"] = str(err)
46-

centinel/primitives/http.py
34:    except Exception as err:
35-        response["failure"] = str(err)
36-

looks like we are? @ben-jones should i close this?

[ben-jones]

@gsathya, sounds great.