Disabling TLS 1.0 support on all public cloud instances

Encryption based on Transport Layer Security v1.0 will be disabled on all public Cumulocity IoT instances on July 1st, 2020. Cumulocity will continue to support v1.1 and v1.2. As all modern browsers do already support by default more recent versions of TLS we do not expect limitations for users. Devices connecting to Cumulocity IoT might need to be updated.