Update rest-api-spec

Author: pquentin

output/schema/validation-errors.json

@@ -15,7 +15,7 @@
     },
     "cluster.put_component_template": {
       "request": [
-        "Request: missing json spec query parameter 'timeout'"
+        "Request: missing json spec query parameter 'cause'"
       ],
       "response": []
     },

specification/_json_spec/cluster.put_component_template.json

@@ -30,9 +30,10 @@
         "description": "Whether the index template should only be added if new or can also replace an existing one",
         "default": false
       },
-      "timeout": {
-        "type": "time",
-        "description": "Explicit operation timeout"
+      "cause": {
+        "type": "string",
+        "description": "User defined reason for create the component template",
+        "default": "api"
       },
       "master_timeout": {
         "type": "time",