Merge pull request elastic/elasticsearch#3272 from jdconrad/deprecate

Deprecate Groovy, Python, and Javascript

Original commit: elastic/x-pack-elasticsearch@e5c1d5a112

elasticsearch/qa/smoke-test-watcher-with-groovy/src/test/resources/rest-api-spec/test/watcher_groovy/50_script_condition.yaml

@@ -70,6 +70,8 @@
   - match: { _id: "watch_with_groovy_closure" }
 
   - do:
+      warnings:
+        - '[groovy] scripts are deprecated, use [painless] scripts instead'
       xpack.watcher.execute_watch:
         id: "watch_with_groovy_closure"
         body: >
@@ -118,6 +120,8 @@
           { "status": "red", "@timestamp": "2005-01-01T00:01:55" }
 
   - do:
+      warnings:
+        - '[groovy] scripts are deprecated, use [painless] scripts instead'
       xpack.watcher.execute_watch:
         id: "watch_with_groovy_closure"
         body: >