In Lightroom Camera Calibration is set to default Adobe Standard. Is it possible to change the default?
You can do this in Lightroom Classic but not in Lightroom CC. Lightroom CC does not even have an interface to change the camera calibration profile.
Lightroom Classic CC is the most current update to Lightroom CC 2015, the "new" Lightroom CC is a new application which provides an alternate "Cloud Centric" route and is in its initial stages of development, i.e. it does not incorporate the majority of advanced features that ae available in Lightroom Classic. See the link below for further info.