Report all cover reports if change in one of the base branches

[sidey79]

Expected Behavior

coverall report covers all files in the base branch for which tests are running.

On a pull request only the changed files should be reported to coveralls.

Actual Behavior

Only changed file from one or more commits are reported to coveralls

Steps to Reproduce the Problem

1. change 00_SIGNALduino.pm
2. commit and push change
3. travis will run tests and push only 00_SIGNALduino.pm

Specifications

https://github.com/RFD-FHEM/RFFHEM/blob/98c120cc9d1aa98b3dc36d6c7f10ed86b09eade8/.travis.yml#L30

https://coveralls.io/github/RFD-FHEM/RFFHEM?branch=dev-r33