Becasue rate limits anonymous and free authenticated use of Docker Hub
went into effect (https://www.docker.com/increase-rate-limits),
we need to login docker with an account.
This patch sets two environment variables
(DOCKER_PASSWORD & DOCKER_USERNAME) for the travis-ci that will be
used to login to the docker hub, thus, we could break the limiting.
Please be aware, the PR submitted from a fork repo will not use
this account due to
https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions
Coverage remained the same at 91.787% when pulling 46b5705b89c2c2e0b752fe322b53ed2b8cf9e65f on minggangw:fix-issue-766 into 6cf3db02a3760e96274f00a1aa47155ae79af74b on RobotWebTools:develop.
Becasue rate limits anonymous and free authenticated use of Docker Hub went into effect (https://www.docker.com/increase-rate-limits), we need to login docker with an account.
This patch sets two environment variables (DOCKER_PASSWORD & DOCKER_USERNAME) for the travis-ci that will be used to login to the docker hub, thus, we could break the limiting. Please be aware, the PR submitted from a fork repo will not use this account due to https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions
Fix #766