Fix Travis CI

[l0rd]

CI is fails as soon as the command ansible-playbook in the APB image is run:

[l0rd]

We should be able to reproduce this problem locally following these instructions https://github.com/ansibleplaybookbundle/eclipse-che-apb#cli-testing

[ibuziuk]

Eugene figured out that in the latest apb-base the way of passing extra-vars has been changed and now should be done via json e.g. -e "{"namespace": "${APB_NAME}"}" . The build should be fixed by his new PR with tls and external keycloak / postgree #24. In the meantime, I have opened an issue for apb-base since the
help is still saying that setting vars via key=value is a valid option ansibleplaybookbundle/apb-base#46

[ghost]

@ibuziuk this PR #24 will require json format anyway, since this is the only way to pass booleans according to docs

[ghost]

Fixed CI in #24
I decided to make lint rules not so strict, and move test commands to a dedicated script to avoid yaml formatting issues in .travis.yaml