This updates the Curator image to use version 5.6.0, which adds
additional actions for use, such as the ability to shrink indices.
This also adds a separate configmap and config secret for Curator,
as this allows us to use separate configmap annotations on the
Elasticsearch component pods to prevent Curator config updates
from triggering recreation of Elasticsearch components. This helps
alleviate overhead associated with Elasticsearch service restarts.
Change-Id: I0aec7756b0dc09bc3981ede950dc88f821aeca4b
88f21acf34