Cleanup, improve integration tests

[gesellix]

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[github-actions]

Test Results

 88 files  + 30   88 suites  +30   15s ⏱️ - 2m 24s
247 tests  - 112  240 ✅  - 104   7 💤  - 8  0 ❌ ±0 
994 runs  +385  972 ✅ +382  22 💤 +3  0 ❌ ±0 

Results for commit e6b016c. ± Comparison against base commit 7c902f6.

This pull request removes 112 tests.

de.gesellix.docker.client.DockerClientImplIntegrationSpec ‑ allows configuration via setter
de.gesellix.docker.client.DockerClientImplIntegrationSpec ‑ auth
de.gesellix.docker.client.DockerClientImplIntegrationSpec ‑ info
de.gesellix.docker.client.DockerClientImplIntegrationSpec ‑ ping
de.gesellix.docker.client.DockerClientImplIntegrationSpec ‑ version
de.gesellix.docker.client.DockerContainerIntegrationSpec ‑ attach (interactive)
de.gesellix.docker.client.DockerContainerIntegrationSpec ‑ attach (read only)
de.gesellix.docker.client.DockerContainerIntegrationSpec ‑ attach (websocket)
de.gesellix.docker.client.DockerContainerIntegrationSpec ‑ commit container
de.gesellix.docker.client.DockerContainerIntegrationSpec ‑ create container
…