Update Promise repository
Update Promise repository

Promise code and test cases had been maintained in GitHub.
Due to the decision to mirror OPNFV Gerrit to GitHub,
the Promise GitHub (https://github.com/opnfv/promise) was
overwritten by the content in Gerrit (which is outdated).

Change-Id: Id03a24d56fb60c144c93ea3e65caf9718d8d4784
Signed-off-by: jose.lausuch <a4ed9890ad7f6494ac84a749f29a4dc3449a1186@ericsson.com>

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