ble(client): add scan timout and configure option

[gen2thomas]

Solved issues and/or description of the change

If there is no BLE device, the connect procedure will never stop. This change adds a timeout and the possibility to configure the timeout by With* option.

Additionally:

• remove unused "AdapterName" property
• add a getter for RSSI value (static value from the moment of connection)
• add some debugging messages
• substitute singleton variables with object properties
• add some missing tests (roadmap(ble): implement support for more peripherals #1004 )

Manual test

• OS and Version (Win/Mac/Linux): Linux
• Adaptor(s) and/or driver(s): client-adaptor

Checklist

• The PR's target branch is 'hybridgroup:dev'
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (e.g. by run make test)
• No linter errors exist locally (e.g. by run make fmt_check)
• I have performed a self-review of my own code