Feature/postponed env read

[simpletasks]

Related to issue #8823

Replace field declaration in ContainerDef: Map<String, String> envVars = new HashMap<>();
with Map<String, Supplier<String>> envVars = new HashMap<>();

[simpletasks]

I added a positive test showing a combination of .dependsOn() and .withEnv() when the dependent container depends on the mapped port of another container.

[simpletasks]

I added a negative test showing failure in test setup using @container annotation and a combination of .dependsOn() and .withEnv() methods when the dependent container depends on the mapped port of another container.

[eddumelendez]

Hi, thanks for your contributions. The proposal is introducing additional changes that are not expected.

[simpletasks]

Hi @eddumelendez can you comment about complete proposal here? IMO this part is missing for 'Container' annotation and how I understand the logic expected from 'Container' annotation.
About 'additional changes', do they make whole solution more robust or introduce some constraints?