simplify DLS role descriptor (#180)

Author: seanstory

Diff for: .gitignore

@@ -1,5 +1,6 @@
 # osx
 .idea
+*.iml
 .DS_Store
 .ipynb_checkpoints
 *.egg-info

Diff for: example-apps/internal-knowledge-search/api/app.py

@@ -134,8 +134,6 @@ def api_key():
                                 "template": {
                                     "params": {"access_control": permissions},
                                     "source": """{
-                                "bool": {
-                                    "filter": {
                                         "bool": {
                                             "should": [
                                                 {
@@ -154,9 +152,7 @@ def api_key():
                                                 }
                                             ]
                                         }
-                                    }
-                                }
-                            }""",
+                                    }""",
                                 }
                             },
                         }