[FIX] core.Component: Correctly handle empty activeTerminologies array
[FIX] core.Component: Correctly handle empty activeTerminologies array

- Prevents accidentally loading of i18n files when an empty array is passed
as 'activeTerminologies'

Change-Id: Ib93327e0de1030a95ecfc458d62ef07782d2447d

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5