Add check of external network before running any test
Add check of external network before running any test

Change-Id: I3ab58d924a8e53f2e6375c1c7fa77361d91b5efb
Signed-off-by: jose.lausuch <a4ed9890ad7f6494ac84a749f29a4dc3449a1186@ericsson.com>

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