Set order of audit log template to 1000 (elastic/x-pack-elasticsearch#4156)

This commit sets the order of the audit log template to 1000 instead of
using the max value. This will allow a user to define a template that
adds an alias.

Original commit: elastic/x-pack-elasticsearch@2267322755

plugin/core/src/main/resources/security_audit_log.json

@@ -1,6 +1,6 @@
 {
   "index_patterns": [ ".security_audit_log*" ],
-  "order": 2147483647,
+  "order": 1000,
   "settings": {
     "index.format": 6
   },