Remove default of 5m refresh on .watches and .watch_history* indices.

This default is far too high for normal use. It makes it very hard to build on top of watcher using the search APIs.

Fixes elastic/elasticsearch#279

Original commit: elastic/x-pack-elasticsearch@4e22d5c19e

src/main/resources/watch_history.json

@@ -5,10 +5,7 @@
     "index.number_of_shards": 1,
     "index.number_of_replicas": 1,
     "index.watcher.template_version": 1,
-    "index.mapper.dynamic" : false,
-    "index.refresh_interval" : "5m",
-    "index.translog.flush_threshold_size" : "1GB",
-    "index.store.throttle.type" : "none"
+    "index.mapper.dynamic" : false
   },
   "mappings": {
     "watch_record": {

src/main/resources/watches.json

@@ -5,8 +5,7 @@
     "index.number_of_shards": 1,
     "index.number_of_replicas": 1,
     "index.watcher.template_version": 1,
-    "index.mapper.dynamic" : false,
-    "index.refresh_interval" : "5m"
+    "index.mapper.dynamic" : false
   },
   "mappings": {
     "watch": {