more bridge_api and condenser_api test

hivemind/tavern/database_api_patterns/find_votes_author_error.pat.json

+{
+    "code": -32003,
+    "data": {
+      "code": 10,
+      "message": "Assert Exception",
+      "name": "assert_exception",
+      "stack": [
+        {
+          "context": {
+            "file": "database_api.cpp",
+            "hostname": "",
+            "level": "error",
+            "line": 1280,
+            "method": "find_votes",
+            "timestamp": "2020-08-31T07:27:49"
+          },
+          "data": {
+            "a": "kental",
+            "p": ""
+          },
+          "format": "comment != nullptr: Could not find comment ${a}/${p}"
+        }
+      ]
+    },
+    "message": "Assert Exception:comment != nullptr: Could not find comment kental/"
+  }
+  
\ No newline at end of file