Update goal, fixed bug in mappings and MqttHandler.

- Base: inserted DefaultMappings did not account for existing other mappings, but always use type of token
- Base: MqttHandler was not able to have multiple newConnections for the same topic
- Goal: Changed way how last update is handled (now packed into currentStep)
- Goal: Added StartStep
- Goal: Changed wait to be in milliseconds
2 jobs for master in 5 minutes and 39 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Build
passed build #15610

00:02:18

 
  Test
passed test #15611

00:03:20