Fixed consensus issues with large no. of users and inputs. (#280)

* Fixed issue in consensus contract output  sorting.

* Improved load test script.

* Removed flatbuffer verifier restrictions to support large no. of users and inputs.

* Improved consensus proposal cleanup.

* Restored the earlier proposal cleanup logic.

* Minor fixes.

* const fix.

src/msg/fbuf/p2pmsg_conversion.cpp

@@ -31,7 +31,7 @@ namespace msg::fbuf::p2pmsg
         const size_t buf_size = message.size();
 
         // Verify container message using flatbuffer verifier
-        flatbuffers::Verifier verifier(buf, buf_size, 16, 100);
+        flatbuffers::Verifier verifier(buf, buf_size);
         return VerifyP2PMsgBuffer(verifier);
     }