clang-error: fix clang-diagnostic-overloaded-virtual error

The error clang-diagnostic-overloaded-virtual is generated
when a function  hides the overloaded virtual function.

Change-Id: I87fdabb4ea9efd0c69d1b030127a6a9782cd3b23
Signed-off-by: Pavithra Barithaya <pavithra.b@ibm.com>