Prefix all SO fields to avoid potential conflicts with future ECS changes

salt/elasticsearch/templates/so/so-case-template.json.jinja

@@ -36,11 +36,11 @@
       "@timestamp": {
         "type": "date"
       },
-      "kind": {
+      "so_kind": {
         "type": "keyword",
         "ignore_above": 1024
       },
-      "operation": {
+      "so_operation": {
         "type": "keyword",
         "ignore_above": 1024
       },      
@@ -48,7 +48,7 @@
         "type": "keyword",
         "ignore_above": 1024
       },
-      "artifact": {
+      "so_artifact": {
         "properties": {
           "artifactType": {
             "type": "keyword",
@@ -121,7 +121,7 @@
           }
         }
       },
-      "artifactstream": {
+      "so_artifactstream": {
         "properties": {
           "content": {
             "type": "text"
@@ -135,7 +135,7 @@
           }
         }
       },
-      "case": {
+      "so_case": {
         "properties": {
           "assigneeId": {
             "type": "keyword",
@@ -193,7 +193,7 @@
           }
         }
       },
-      "comment": {
+      "so_comment": {
         "properties": {
           "caseId": {
             "type": "keyword",
@@ -211,7 +211,7 @@
           }
         }
       },
-      "related": {
+      "so_related": {
         "properties": {
           "caseId": {
             "type": "keyword",