Revert "build: update travis to use fedora:latest container over f27"
Revert "build: update travis to use fedora:latest container over f27"

This reverts commit dc3a9c6a4bdcbd61abc4c20f7ab94fb6e353b6fc.

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp