Update dockerfile-maven-plugin to 1.4.13

[php-coder]

See

• 1.4.7: https://github.com/spotify/dockerfile-maven/releases/tag/v1.4.7
• 1.4.8: https://github.com/spotify/dockerfile-maven/releases/tag/v1.4.8
• 1.4.9: https://github.com/spotify/dockerfile-maven/releases/tag/v1.4.9
• 1.4.10: https://github.com/spotify/dockerfile-maven/releases/tag/v1.4.10
• 1.4.11: https://github.com/spotify/dockerfile-maven/releases/tag/v1.4.11
• 1.4.12: https://github.com/spotify/dockerfile-maven/releases/tag/v1.4.12
• 1.4.13: https://github.com/spotify/dockerfile-maven/releases/tag/v1.4.13

Also try to remove our workaround for Dockerfile. See https://github.com/spotify/dockerfile-maven/pull/89

[php-coder]

The following PR also could be helpful: https://github.com/spotify/dockerfile-maven/pull/259