[Clearwater Test] Fix bug in error message
[Clearwater Test] Fix bug in error message

Change-Id: I5d1a3f44915821fcf778c4bcecb32d2aaf475262
Signed-off-by: boucherv <92505b05743740ff7910a3d93741c58e8604a7fb@orange.com>

opnfv/functest,opnfv/functest,mywulin/functest,mywulin/functest