Remove functest-tempest from travis-ci
Remove functest-tempest from travis-ci

It fails due to the former container builds [1]

[1] https://travis-ci.org/collivier/functest/builds/557461053

Change-Id: I0d919ded13348e66852b79e2bdeba53add729d9b
Signed-off-by: Cédric Ollivier <d48310251a4a484d041bc5d09a9ac4d86d20f793@orange.com>

opnfv/functest,opnfv/functest