Fixed bug in naming conventions.

Fixed bug in naming conventions.
In yang-data-util changed package name from
org.opendaylight.controller.data.util to
org.opendaylight.controller.yang.data.util;
In yang-model-api changed package name from
org.opendaylight.controller.model.api.type to
org.opendaylight.controller.yang.model.api.type;
In yang-model-util changed package name from
org.opendaylight.controller.model.util to
org.opendaylight.controller.yang.model.util;

Refactored and updated all imports dependant on projects
yang-model-util, yang-model-api and yang-model-util

Signed-off-by: lsedlak <lsedlak@cisco.com>