BUG-1535 Ignore exception on toaster.close

It tries to delete data from store, but if the broker gets closed it cannot remove data since the broker throws exception

Change-Id: I49bbbe410b9f1cb67711974c27f0375dc15c17dc
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Merge "BUG-1535 Ignore exception on toaster.close"