Update Ceilometer for Pike

- ceilometer.conf is updated for Pike
- updated run_tests.sh script from salt-formula-coockiecutter
- fixed kitchen tests
- added ssl
- agent states ids made unique
- fixed typo in agent option
- database section is made optional, because it is deprecated 
  in favor of gnocchi

Change-Id: I5b1f32ab606710be54980cdefa26450f8de2868b
18 files changed