fix linter errors and copyright

Change-Id: Idf7384307623c70a9f7714a5d276f404873c5974
Issue-ID: TEST-198
Signed-off-by: DR695H <dr695h@att.com>
diff --git a/robotframework-onap/ONAPLibrary/PreloadData.py b/robotframework-onap/ONAPLibrary/PreloadData.py
index 4d24078..0ffd134 100644
--- a/robotframework-onap/ONAPLibrary/PreloadData.py
+++ b/robotframework-onap/ONAPLibrary/PreloadData.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ONAPLibrary.robotlibcore import HybridCore
+from robotlibcore import HybridCore
 from ONAPLibrary.PreloadDataKeywords import PreloadDataKeywords