Fix Operation not permitted warning.

This fix removes warning
WARN  o.o.c.n.c.m.c.ModuleElementDefinition - Operation not permitted on
current strategy  while default strategy is merge. Element definition
strategy set to default

that occured on osgi startup.

Change-Id: Ic12ce37e9bfa08cfffd0cac0e591fc49ffe227c6
Signed-off-by: Martin Bobak <mbobak@cisco.com>