Enable log collection after functional testing

This change enables log collection within the gate so that further analysis
on gate tasks can be performed post build. This is very useful when
debugging problems.

Change-Id: I376b5bf2d395314de5ed22489277eacd2fc32839
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

tox.ini

@@ -145,6 +145,11 @@ commands =
 
 
 [testenv:functional]
+# Ignore_errors is set to true so that the logs are collected at the
+#  end of the run. This will not produce a failse positive. Any
+#  exception will be mark the run as failed and exit 1 after all of
+#  the commands have been iterated through.
+ignore_errors = True
 # NOTE(odyssey4me): this target does not use constraints because
 # it doesn't work in OpenStack-CI yet. Once that's fixed, we can
 # drop the install_command.
@@ -160,6 +165,9 @@ commands =
                      -e "rolename={toxinidir}" \
                      -e "install_test_packages=True" \
                      {toxinidir}/tests/test.yml -vvvv
+    bash -c 'mkdir -p {toxinidir}/logs'
+    bash -c 'rsync -av --ignore-errors /var/log/ /openstack/log/ {toxinidir}/logs/ || true'
+
 
 
 [testenv:linters]