Adds support for Tier and SlaPolicy to the Job interface (#99)

* Adding parameter for Aurora so that we're able to run SLA aware updates with less than 20 instances. Lowered time it takes to run test by reducing watch time per instance as well.

* Reducing the number of instances and time for SLA aware instances in docker-compose set up.

* Adding another Mesos agent to the docker-compose setup.

* Huge thanks to @zircote for this contribution.

realis_e2e_test.go

@@ -750,3 +750,76 @@ func TestRealisClient_PartitionPolicy(t *testing.T) {
 	// Clean up after finishing test
 	_, err = r.KillJob(job.JobKey())
 }
+
+func TestAuroraJob_UpdateSlaPolicy(t *testing.T) {
+
+	tests := []struct {
+		name string
+		args aurora.SlaPolicy
+	}{
+		{
+			"create_service_with_sla_count_policy_test",
+			aurora.SlaPolicy{CountSlaPolicy: &aurora.CountSlaPolicy{Count: 1, DurationSecs: 15}},
+		},
+		{
+			"create_service_with_sla_percentage_policy_test",
+			aurora.SlaPolicy{PercentageSlaPolicy: &aurora.PercentageSlaPolicy{Percentage: 0.25, DurationSecs: 15}},
+		},
+		{
+			"create_service_with_sla_coordinator_policy_test",
+			aurora.SlaPolicy{CoordinatorSlaPolicy: &aurora.CoordinatorSlaPolicy{
+				CoordinatorUrl: "http://localhost/endpoint", StatusKey: "aurora_test"}},
+		},
+	}
+	role := "vagrant"
+
+	_, err := r.SetQuota(role, thrift.Float64Ptr(6.0), thrift.Int64Ptr(1024), thrift.Int64Ptr(1024))
+	assert.NoError(t, err)
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+
+			// Create a single job
+			job := realis.NewJob().
+				Environment("prod").
+				Role(role).
+				Name(tt.name).
+				ExecutorName(aurora.AURORA_EXECUTOR_NAME).
+				ExecutorData(string(thermosPayload)).
+				CPU(.01).
+				RAM(2).
+				Disk(5).
+				InstanceCount(4).
+				IsService(true).
+				SlaPolicy(&tt.args).
+				Tier("preferred")
+
+			settings := realis.NewUpdateSettings()
+			settings.UpdateGroupSize = 2
+			settings.MinWaitInInstanceRunningMs = 5 * 1000
+
+			_, result, err := r.CreateService(job, settings)
+			assert.NoError(t, err)
+			assert.NotNil(t, result)
+
+			var ok bool
+			var mErr error
+
+			if ok, mErr = monitor.JobUpdate(*result.GetKey(), 5, 240); !ok || mErr != nil {
+				// Update may already be in a terminal state so don't check for error
+				_, err := r.AbortJobUpdate(*result.GetKey(), "Monitor timed out.")
+
+				_, err = r.KillJob(job.JobKey())
+
+				assert.NoError(t, err)
+			}
+			assert.True(t, ok)
+			assert.NoError(t, mErr)
+
+			// Kill task test task after confirming it came up fine
+			_, err = r.KillJob(job.JobKey())
+
+			assert.NoError(t, err)
+		})
+	}
+}