Collect API logs when Cinder runs in Apache

This change configures an additional Heka input/decoder to collect the
Apache logs from the Cinder API. It also adjusts the log format to
derive HTTP response metrics from the logs.

Change-Id: Ifb81a4a3e23778672f93c9d953da011d8ec6bd17
Depends-On: I42833a45aa593114cad330ee2bf2bc3b3d00497e
2 files changed