Allow message to match on multiple OS

[luke-orden]

This fixes #242

Currently when a matching OS is found we do not check remaining OS. This
mean that if 2 OS have message prefixes that match each other's logs
then you cannot be sure that the message will be forwarded onto the
correct device process.

I have updated so the message is now forwarded onto all matching os, not
just the first match.

To allow the tests to work correctly I have removed 'send_raw': True
from the config test.

[todo]

Should we stop searching and just return, or should we return all matches OS?

napalm-logs/napalm_logs/server.py

Lines 174 to 179 in a839c02

	# TODO Should we stop searching and just return, or should we return all matches OS?
	return msg_dict
	def _identify_os(self, msg):
	'''
	Using the prefix of the syslog message,

---

This comment was generated by todo based on a TODO comment in a839c02 in #245. cc @loverend.

[coveralls]

Coverage increased (+0.2%) to 43.173% when pulling 15adfe3 on loverend:send_to_multiple_os into fa78472 on napalm-automation:develop.

[luke-orden]

Removed the todo mentioned above as it is no longer relevant.

[mirceaulinic]

Can you please fix also the py3 issues so the tests run cleanly:

=================================== FAILURES ===================================
_______________________________________  _______________________________________
napalm_logs/listener/kafka.py:17:1: W0612 local variable 'err' is assigned to but never used [pyflakes]
_______________________________________  _______________________________________
napalm_logs/listener/zeromq.py:16:1: W0612 local variable 'err' is assigned to but never used [pyflakes]
_______________________________________  _______________________________________
napalm_logs/transport/kafka.py:15:1: W0612 local variable 'err' is assigned to but never used [pyflakes]