Issue with hash calculation

[antho1404]

When working on #1316 I discover that whatever the value I add in the constant, the hash will stay the same.

Example:

key: Event
steps:
  - type: trigger
    instanceHash: H74Qqq8nT5JZ9GSJmuSWLN5benWZPkUb5pYcvQLsoZX 
    eventKey: eventX
  - type: task
    instanceHash: DTjy36ApV5YVbyXm67iWeAsD9uCbZETcPL1TbUPwHeYJ
    taskKey: taskY
    inputs:
      inputA: hello world

and

key: Event
steps:
  - type: trigger
    instanceHash: H74Qqq8nT5JZ9GSJmuSWLN5benWZPkUb5pYcvQLsoZX 
    eventKey: eventX
  - type: task
    instanceHash: DTjy36ApV5YVbyXm67iWeAsD9uCbZETcPL1TbUPwHeYJ
    taskKey: taskY
    inputs:
      inputA: "different value that should change the hash"

will generate the same hash