Remove paho-mqtt from .travis.yml
Merge pull request #1 from imZack/develop

Fix #1 Travis build issue
Revert "Travis build issue"
Merge pull request #2 from Sanji-IO/revert-1-develop

Revert "Travis build issue"
Revert "Revert "Travis build issue""
Merge pull request #3 from Sanji-IO/revert-2-revert-1-develop

Revert "Revert "Travis build issue""