Description of the problem:

v2 getWorkflowInputSchemaById API goes into inifinite loop when called for hello_world workflow. 

How reproducible:
100%

Steps to reproduce:

1. run orchestrator plugins in dev mode

2. run 
curl -H "Authorization: Bearer $token" http://localhost:7007/api/orchestrator/workflows/hello_world/inputSchema

Actual results:gets stuck

Expected results:
return schema