Fixes and tests
[dockerfile] Fix contextAddFile checksum calculation
- Fix empty checksum
- Fix os-sensitive contextAddFile path in the checksum
[logging] Show nameless image correctly
[tests] Build/Stapel/Git: developer mode test
[tests] Dockerfile Suite: fix project name is not set
[tests] Dockerfile Suite: upd contextAddFile test
[ci] Daily Tests: fix temporary docker config directory