Create containers in parallel when possible

[denkv]

User story

To make things faster, containers should not be created one by one and created in parallel when possible.

Possible opportunities:

• https://github.com/hobbit-project/platform/blob/e8c1d84fd70e2d80e879bf81c1b4c2a7b1e949f6/platform-controller/src/main/java/org/hobbit/controller/ExperimentManager.java#L239-L273
• https://github.com/hobbit-project/platform/blob/e8c1d84fd70e2d80e879bf81c1b4c2a7b1e949f6/platform-controller/src/main/java/org/hobbit/controller/ExperimentManager.java#L346-L349

Solution

We already have API for that and it was tested with ORCA:

• https://github.com/dice-group/orca/blob/02e46a0fae6c199955252e4138b27325beecb45b/ldcbench.controller/src/main/java/org/dice_research/ldcbench/benchmark/BenchmarkController.java#L137