Update QueryNode and QueryEdge protobuf construct handler read mode to avoid internal PMGD validation check exception

A read-write validation check is performed internally by PMGD. When running a query node/edge
transaction with a readOnly flag a validation check will trigger an exception.
The exception message will be propagated to the query response.

This change allows the validation to pass while technically the transaction is still a readOnly operation.
The validation occurs in the PMGD codebase, updating it is not reasonable at this time.

Signed-off-by: Steven Rojas <[email protected]>

Author: StevenRojasC

src/PMGDQuery.cc

@@ -676,6 +676,8 @@ void PMGDQuery::QueryNode(int ref, const std::string &tag,
                           const Json::Value &constraints,
                           const Json::Value &results, bool unique,
                           bool intermediate_query) {
+  _readonly = false;
+
   PMGDCmd *cmdquery = new PMGDCmd();
   cmdquery->set_cmd_id(PMGDCmd::QueryNode);
   cmdquery->set_cmd_grp_id(_current_group_id);
@@ -713,6 +715,8 @@ void PMGDQuery::QueryEdge(int ref, int src_ref, int dest_ref,
                           const std::string &tag,
                           const Json::Value &constraints,
                           const Json::Value &results, bool unique) {
+  _readonly = false;
+
   PMGDCmd *cmdquery = new PMGDCmd();
   cmdquery->set_cmd_id(PMGDCmd::QueryEdge);
   cmdquery->set_cmd_grp_id(_current_group_id);