Spotify: tizonia does not exit when the Spotify login attempt fails

[juanrubio]

Description

When the Spotify login fails (e.g. because user credentials are incorrect) the application should exit with OMX_ErrorInsuficientResources.

Steps to Reproduce

1. Configure in tizonia.conf Spotify with some random user and/or pass (same effect when command line args --spotify-user and --spotify-password are used)
2. Start tizonia with some spotify search option

Expected behavior: [What you expect to happen]
The application exits with an error message that clearly indicates to the user that the login attempt has failed.

Actual behaviour: [What actually happens]
The error message is there but it is not clear and the application fails to exit.

Reproduces how often: [What percentage of the time does it reproduce?]
Always.

Versions

At least since 0.15.0.

Installation Method Used

All methods.