Repro for sbt-codacy-coverage issue 20

sbt clean coverage test
CODACY_PROJECT_TOKEN=dummy sbt codacyCoverage
# build fails with
# FileNotFoundException: .../sbt-codacy-coverage-issue-20/target/scala-2.11/coverage-report/codacy-coverage.json (No such file or directory)

mkdir -p target/scala-2.11/coverage-report/
# build fails with
# Failed to upload data. Reason: not found