Do not try to initialize Pushover when initialize fails

[jimboca]

2021-06-17 15:37:55,456 Controller polyinterface      ERROR    PolyglotREST:l_error: controller:reponse:post: Bad request: https://api.pushover.net/1/users/validate.json: text: {"user":"invalid","errors":["user key is invalid"],"status":0,"request":"d06d0bab-3bdc-4921-9230-99cde7e85a87"}
2021-06-17 15:37:55,917 NodeServer polyinterface      ERROR    Controller:l_error: controller:Notification Controller:write_profile: Node po_pushover failed to initialize init_st=False