`docker stop --time` increased to 5 seconds

[cnicolaescu]

When my company's (Windows) build infrastructure is under heavy load, Jenkins pipelines start failing because Docker containers cannot be stopped in 1 second:

java.io.IOException: Failed to kill container '84ed22ea737f82f2e0a51e813cc9b807c6a48f7154ebffc360ca365fd27ed248'.
12:04:11  	at org.jenkinsci.plugins.docker.workflow.client.DockerClient.stop(DockerClient.java:184)

5 seconds should be a more reasonable timeout.

Alternatively, the timeout should be exposed as a config option.

Testing done

No testing was done.

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