travis_wait to prevent travis build time out

[FanJups]

Describe the bug
My suggestion is related to a bug that might happen : preventing a travis build time out .

To do this, just add travis_wait as follows in .travis.yml :

language:
  java

before_script:
  - cd plugin-code
  - travis_wait pip install --user codecov

after_success:
  - codecov

[bischoffdev]

This never happened before because the build time is really short for this project.
Thanks for your suggestion - I will consider this for future projects.