Support custom start-up and clean-up time for VMs (#112)

This pull request implements customizable startup and clean-up time for virtual machine. 
We achieve this by implementing `SimWorkload` chaining and modelling start-up and 
clean-up time using `SimWorkload` as well.

Implements #33

## Implementation Notes :hammer_and_pick:

* Store method parameters in class files
* Add completion parameter to startWorkload
* Provide workload constructors in SimWorkloads 
* Add support for resetting machine context 
* Add support for chaining workloads 
* Use workload chaining for boot delay 
* Model host boot time 
* Do not suspend on guest start 
* Use static logger field 

## Breaking API Changes :warning:

* `SimMachine#startWorkload` now has a third parameter `completion` which is invoked when
   the workload finishes executing (either due to failure or success).
* `SimFlopsWorkload` and `SimRuntimeWorkload` can be instantiated via `SimWorkloads`.

1 files changed, 2 insertions, 2 deletions

diff --git a/opendc-compute/opendc-compute-service/src/test/kotlin/org/opendc/compute/service/ComputeServiceTest.kt b/opendc-compute/opendc-compute-service/src/test/kotlin/org/opendc/compute/service/ComputeServiceTest.kt
index 73e9b3d7..c18709f3 100644
--- a/opendc-compute/opendc-compute-service/src/test/kotlin/org/opendc/compute/service/ComputeServiceTest.kt
+++ b/opendc-compute/opendc-compute-service/src/test/kotlin/org/opendc/compute/service/ComputeServiceTest.kt
@@ -348,7 +348,7 @@ internal class ComputeServiceTest {
         // Start server
         server.start()
         delay(5L * 60 * 1000)
-        coVerify { host.spawn(capture(slot), true) }
+        coVerify { host.spawn(capture(slot)) }
 
         listeners.forEach { it.onStateChanged(host, slot.captured, ServerState.RUNNING) }
 
@@ -376,7 +376,7 @@ internal class ComputeServiceTest {
         every { host.state } returns HostState.UP
         every { host.canFit(any()) } returns true
         every { host.addListener(any()) } answers { listeners.add(it.invocation.args[0] as HostListener) }
-        coEvery { host.spawn(any(), true) } throws IllegalStateException()
+        coEvery { host.spawn(any()) } throws IllegalStateException()
 
         service.addHost(host)