Use the six library to get monasca-agent to work with
python2.7 and python3.
Story: 2004148
Task: 27621
Change-Id: I0de315967dd5a745741fda0c53ce8cc85cda8cc5
Signed-off-by: Chuck Short <chucks@redhat.com>
update where ```iteritems``` is used
1.As mentioned in [1], we should avoid using
six.iteritems to achieve iterators. We can
use dict.items instead, as it will return
iterators in PY3 as well. And dict.items/keys
will more readable. 2.In py2, the performance
about list should be negligible, see the link [2].
[1] https://wiki.openstack.org/wiki/Python3
[2] http://lists.openstack.org/pipermail/openstack-dev/2015-June/066391.html
Change-Id: Ic82c26e0f37bd3ecea98bc85bd98bd62c8d762a2
