NXCALS-1619 Removes jcenter repository definition from gradle plugins configuration

#Merge request template @acc-logging-team - please have a look for approval.

This repo is causing our staging pipeline on Jenkins to fail. Jcenter often undergoes heavy http load and thus serves requests for dependencies, with slower response time than usual. Jenkins http request is getting timeout, thus the process returns** 502 Bad Gateway** and our pipeline fails due to this external issue.

This MR replaces jcenter with our internal ds-release repository to avoid such network related timeouts.