Apply cookiecutter to newly split project telemetry-tempest-plugin

This tempest plugin is being split out of the main ceilometer project in
accordance with Queens goal "Split Tempest Plugins into Separate
Repos/Projects"[1]. This patch applies the standard boilerplate files
for OpenStack projects so that it can stand on its own.

It contains tempest tests for Aodh, Gnocchi, Ceilometer and Panko projects.

[1] https://governance.openstack.org/tc/goals/queens/split-tempest-plugins.html
diff --git a/.mailmap b/.mailmap
new file mode 100644
index 0000000..516ae6f
--- /dev/null
+++ b/.mailmap
@@ -0,0 +1,3 @@
+# Format is:
+# <preferred e-mail> <other e-mail 1>
+# <preferred e-mail> <other e-mail 2>