[MESOS-6053] Combine test helpers into one single binary.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Labels: tech-debt
• Sprint: Mesosphere Sprint 41, Mesosphere Sprint 42
• Story Points: 3
• Assignee: Jie Yu
• Reporter: Jie Yu
• Created: 17/Aug/16 18:28
• Updated: 18/Jul/17 16:56
• Resolved: 18/Jul/17 16:56

Description

Currently, we have multiple test helper binaries
setns-test-helper
memory-test-helper
active-user-test-helper

And we are adding more:
capabilities-test-helper (https://reviews.apache.org/r/50269)

Since most of them already use `Subcommand`, we should combine them into one single binary. That will simply adding a new test helper that has to run in a separate process.