Merge ~powersj/cloud-init:unittest-add-timing into cloud-init:master

[Joshua Powers]

tox: add nose timer output

This adds the output of the nose timer plugin to the py3
environment to tox. This will print out the 10 longest running
tests and automatically turn tests longer than 1 second "red"
after the coverage output.

[Joshua Powers (powersj)]

Example output:
https://paste.ubuntu.com/25447308/

[Chad Smith (chad.smith)]

+1 looks good to me!

review: Approve

[Server Team CI bot (server-team-bot)]

FAILED: Continuous integration, rev:9412ec30b2f3e36124e696a08f7e09ab8aa99e45
https://jenkins.ubuntu.com/server/job/cloud-init-ci/252/
Executed test runs:
    SUCCESS: Checkout
    FAILED: Unit & Style Tests

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/252/rebuild

review: Needs Fixing (continuous-integration)

[Chad Smith (chad.smith)]

+1 Yep much better and limits it to our py3 env, which already does the extra work of coverage etc. It feels like that's a better home anyway (and avoids issues with other targets).

review: Approve

[Server Team CI bot (server-team-bot)]

PASSED: Continuous integration, rev:25fd8f8b13f09a99e847d114719a8036faf6b020
https://jenkins.ubuntu.com/server/job/cloud-init-ci/253/
Executed test runs:
    SUCCESS: Checkout
    SUCCESS: Unit & Style Tests
    SUCCESS: Ubuntu LTS: Build
    SUCCESS: Ubuntu LTS: Integration
    SUCCESS: MAAS Compatability Testing
    IN_PROGRESS: Declarative: Post Actions

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/253/rebuild

review: Approve (continuous-integration)

diff --git a/tox.ini b/tox.ini
index ec96e85..72de983 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,10 +30,13 @@ commands = {envpython} -m pylint {posargs:cloudinit}
 
 [testenv:py3]
 basepython = python3
-deps = -r{toxinidir}/test-requirements.txt
-commands = {envpython} -m nose {posargs:--with-coverage \
-           --cover-erase --cover-branches --cover-inclusive \
-           --cover-package=cloudinit tests/unittests cloudinit}
+deps =
+    nose-timer
+    -r{toxinidir}/test-requirements.txt
+commands = {envpython} -m nose --with-timer --timer-top-n 10 \
+           {posargs:--with-coverage --cover-erase --cover-branches \
+            --cover-inclusive --cover-package=cloudinit \
+            tests/unittests cloudinit}
 
 [testenv:py27]
 basepython = python2.7