Refactoring API management

[olibos]

Tasks:

• Token should be stored and persisted for 30 minutes
• Persist StationCodes, DeviceId/DeviceTypeId to avoid to request those everytime

Source: @fmarton #1 (comment)

[fmarton]

I hided my comments in this topic. I think the limits should be enough for operating this integration when no more api client.
I think token request in every 5 mins is more simplier than any other solution.
Static DevID, DevType shouldnot be complicated development (same than stationCode). A script may be enogh that get the right parameters. user can copy them into the configuration.yaml. Set this feature lower proirity.
Thank you
Ferenc