Add a default retention policy for skydive indexes

Given the ops tools now have a skydive deployment capability there needs
curator needs to be able to detect the addition of skydive indexes and
build a curator policy accordingly.

This change adds the new retention policy to the overlay inventory
providing a sane default for most environments.

The retention action files have been updated to remove the "-" as an
index separator. This was done because not all indexes use a dash as a
divider.

Change-Id: I5b61720f27da00e0c3b92341355b09ea6c01caba

elk_metrics_6x/roles/elastic_curator/templates/curator-actions-age.yml.j2

@@ -36,7 +36,7 @@
    {
     'filtertype': 'pattern',
     'kind': 'prefix',
-    'value': key + '-'
+    'value': key
    }
   )
 -%}

elk_metrics_6x/roles/elastic_curator/templates/curator-actions-size.yml.j2

@@ -36,7 +36,7 @@
    {
     'filtertype': 'pattern',
     'kind': 'prefix',
-    'value': key + '-'
+    'value': key
    }
   )
 -%}

elk_metrics_6x/roles/elastic_retention/defaults/main.yml

@@ -27,6 +27,7 @@ elastic_index_retention_algorithm: default
 #  elastic_journalbeat_retention: 1
 #  elastic_metricbeat_retention: 1
 #  elastic_packetbeat_retention: 1
+#  elastic_skydive_retention: 1
 
 ## These options are all in megabytes.
 #  elastic_logstash_size: 1024
@@ -37,6 +38,7 @@ elastic_index_retention_algorithm: default
 #  elastic_journalbeat_size: 1024
 #  elastic_metricbeat_size: 1024
 #  elastic_packetbeat_size: 1024
+#  elastic_skydive_size: 1024
 
 ## WHen a static retention policy option is not defined these options will be
 ## used for dynamic fact generation.
@@ -94,6 +96,9 @@ elastic_beat_retention_policy_hosts:
   packetbeat:
     weight: 1
     hosts: "{{ groups['hosts'] | default([]) }}"
+  skydive:
+    weight: 1
+    hosts: "{{ groups['skydive_analyzers'] | default([]) }}"
 
 # Refresh the elasticsearch retention policy local facts.
-elastic_retention_refresh: false
+elastic_retention_refresh: false