This updates the fluentd buffer output configurations to account
for the restraints of the jobs deploying fluentd. This also
renames the fluentd configuration key from td_agent to fluentd to
reflect the fact we're no longer deploying td-agent
This also updates the Elasticsearch default replicas and overrides
the replica counts in each Elasticsearch deployment to account for
resource constraints
Change-Id: I55dee410eced99c3e1645f7452e4306ad646e601
4c29bafcbc