Investigate failing docker in tests

[masokol]

Recently i have observed the cassandra docker container fail to start in CI. Exit status 3?

[INFO] --- docker-maven-plugin:0.35.0:start (start-it-cassandra) @ standalone-integration ---
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra1": Start container 04a88f65b25f
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra1": Network mode: default
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra1": Waiting for ports [9042] directly on container with IP (172.17.0.2).
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra1": Waited on tcp port '[/172.17.0.2:9042]' 5540 ms
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra2": Start container 219ce4e24c06
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra2": Network mode: default
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra2": Waiting for ports [9042] directly on container with IP (172.17.0.3).
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra2": Waited on tcp port '[/172.17.0.3:9042]' 16091 ms
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra3": Start container 375df8faed6f
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra3": Network mode: default
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra3": Waiting for ports [9042] directly on container with IP (172.17.0.4).
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra3": Waited on tcp port '[/172.17.0.4:9042]' 22107 ms
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra4": Start container 947b48f5ab6d
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra4": Network mode: default
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra4": Waiting for ports [9042] directly on container with IP (172.17.0.5).
Error:  DOCKER> [ecc-cassandra-test:4.0] "cassandra4": Container stopped with exit code 3 unexpectedly after 22618 ms while waiting on tcp port '[/172.17.0.5:9042]'
Error:  DOCKER> Error occurred during container startup, shutting down...
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra4": Stop and removed container 947b48f5ab6d after 0 ms
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra3": Stop and removed container 375df8faed6f after 0 ms
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra2": Stop and removed container 219ce4e24c06 after 0 ms
[INFO] DOCKER> [ecc-cassandra-test:4.0] "cassandra1": Stop and removed container 04a88f65b25f after 0 ms
Error:  DOCKER> I/O Error [[ecc-cassandra-test:4.0] "cassandra4": Container stopped with exit code 3 unexpectedly after 22618 ms while waiting on tcp port '[/172.17.0.5:9042]']