fix tracers and logging Working outside of application context

[avara1986]

Fix error log when use logger working outside of application context

import logging
from pyms.constants import LOGGER_NAME
from pyms.flask.app import Microservice

logger = logging.getLogger(LOGGER_NAME)

app = Microservice(service="my-minimal-microservice", path=__file__).create_app()
logger.debug("holi")

return:

ERROR:pyms-tracer:Tracer error Working outside of application context.

This typically means that you attempted to use functionality that needed
to interface with the current application object in some way. To solve
this, set up an application context with app.app_context().  See the
documentation for more information.
{"timestamp": "2019-12-13T07:54:25.730062Z", "level": null, "name": "pyms", "module": "test", "funcName": "<module>", "lineno": 10, "message": "holi", "severity": "DEBUG", "service": "python microservice"}

import logging
from pyms.constants import LOGGER_NAME
from pyms.flask.app import Microservice

logger = logging.getLogger(LOGGER_NAME)

app = Microservice(service="my-minimal-microservice", path=__file__).create_app()
with app.app_context():
    logger.debug("holi")

return

ERROR:pyms-tracer:Tracer error Working outside of request context.

This typically means that you attempted to use functionality that needed
an active HTTP request.  Consult the documentation on testing for
information about how to avoid this problem.
{"timestamp": "2019-12-13T07:55:08.355171Z", "level": null, "name": "pyms", "module": "test", "funcName": "<module>", "lineno": 11, "message": "holi", "severity": "DEBUG", "service": "python microservice"}

[coveralls]

Coverage decreased (-0.0007%) to 99.681% when pulling 58da91c on fix/loggers_out_of_context into b48232f on master.

[alexppg]

LGTM aunque ya esté, que lo había leído pero no probado. gracias!