Use timestamp instead of datetime when creating Counter

Change-Id: I444b96196107383840c6c9ac070492ecf34079f2

ceilometer/compute/network.py

@@ -41,7 +41,7 @@ class FloatingIPPollster(plugin.PollsterBase):
                                       user_id=None,
                                       project_id=ip.project_id,
                                       resource_id=ip.id,
-                                      datetime=None,
+                                      timestamp=None,
                                       duration=None,
                                       resource_metadata={
                         'address': ip.address,

run_tests.sh

@@ -2,5 +2,5 @@
 # Simple test runner, should be replaced with tox
 
 rm -rf cover
-nosetests -P -d -v --with-coverage --cover-package=ceilometer --cover-inclusive tests
+nosetests -P -d -v --cover-erase --with-coverage --cover-package=ceilometer --cover-inclusive tests
 tox -e pep8