Fix task group name

Previously when creating a job, Poseidon would still use the old
task group name format instead of default-group as expected.

nomad/job.go

@@ -1,13 +1,12 @@
 package nomad
 
 import (
-	"fmt"
 	nomadApi "github.com/hashicorp/nomad/api"
 )
 
 const (
-	TaskGroupNameFormat = "%s-group"
-	TaskName            = "default-task"
+	TaskGroupName = "default-group"
+	TaskName      = "default-task"
 )
 
 // LoadJobList loads the list of jobs from the Nomad api.
@@ -23,13 +22,13 @@ func (nc *nomadAPIClient) JobScale(jobID string) (jobScale uint, err error) {
 		return
 	}
 	// ToDo: Consider counting also the placed and desired allocations
-	jobScale = uint(status.TaskGroups[fmt.Sprintf(TaskGroupNameFormat, jobID)].Running)
+	jobScale = uint(status.TaskGroups[TaskGroupName].Running)
 	return
 }
 
 // SetJobScale sets the scaling count of the passed job to Nomad.
 func (nc *nomadAPIClient) SetJobScale(jobID string, count uint, reason string) (err error) {
 	intCount := int(count)
-	_, _, err = nc.client.Jobs().Scale(jobID, fmt.Sprintf(TaskGroupNameFormat, jobID), &intCount, reason, false, nil, nil)
+	_, _, err = nc.client.Jobs().Scale(jobID, TaskGroupName, &intCount, reason, false, nil, nil)
 	return
 }