Found via unit test:
```sh
$ nosetests -x test/
....................................................................................E
======================================================================
ERROR: test_geocode_address_with_valid_params (test.test_mapzengeocoder.MapzenGeocoderTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/requests_mock/mocker.py", line 177, in inner
return func(*args, **kwargs)
File "/home/ubuntu/src/dataservices-api/server/lib/python/cartodb_services/test/test_mapzengeocoder.py", line 100, in test_geocode_address_with_valid_params
country='ESP')
File "/home/ubuntu/src/dataservices-api/server/lib/python/cartodb_services/cartodb_services/mapzen/qps.py", line 28, in wrapped_function
return QPSService(retry_timeout=timeout, queries_per_second=qps).call(original_function, *args, **kwargs)
File "/home/ubuntu/src/dataservices-api/server/lib/python/cartodb_services/cartodb_services/mapzen/qps.py", line 53, in call
raise e
AttributeError: 'NoneType' object has no attribute 'lower'
----------------------------------------------------------------------
Ran 85 tests in 0.140s
FAILED (errors=1)
```
The number of retries was being passed as the pool size parameter.
This is corrected but number of retries changed to 1 to maintain previous behaviour.
- It's not mandatory to have the log_path defined for all the services
- Now we add metrics to a MetricsGatherer using the add method in order
to gather data from all the function scope, not just in one defined
point
- There is a `metrics` context manager to wrap the function block. This
context manager get the execution time for the block among other
things
Rafa de la Torre