Fix com.alkacon.opencms.v8.commons

With commits 7c4c2fff6b610c0f1892252067766f52122d738a and
cda8941c1359e361ac180182b8a14455e504bf57 in opencms-core,
CmsADEConfigData.CONTENT_FOLDER_NAME becomes
CmsADEManager.CONTENT_FOLDER_NAME.