Provide tooling for storing heap dumps after tests

[mnovak]

This tooling should be able to store heap dump in case that java application in the container failed for example for OOME.

Thinking of of this tooling should be general that it will allow to store any required file from the container in case that such a test fails. One of naive ideas would be to mark such a test by special annotation which would store (or search file based on pattern) in given pods (specified by pattern as well). Probably something like:

@StoreFilesFromPod(containerName=".*myapp.*", fileName=".*hprof.*", path="/home/jboss")
@Test 
public void myTest() {...}

[mnovak]

I was thinking how to gather files from dead container (for example when running process crashes). After reading Openshift documentation this might be feasable only if pod does not restart which requires to set restartPolicy to Never. Problem is that it's not possible to set it on deployment config (unsupported in Openshift). For this reason the usage is very limited, question is also how it would work with operators. For those reasons I would resign for this feature until there is better support on Openshift side.