tests: hup: rollback-altboot: replace while loop over SSH to speed up…

… tests

The altboot test often hangs for a long time during the altboot test, after the DUT has booted into the old OS after the altboot failure - the check to see if the rollback systemd services have stopped hangs. This is an attempt to fix that, as I think there's some strange interaction going on with the while loop over ssh

Change-type: patch
Signed-off-by: Ryan Cooke <ryan@balena.io>

tests/suites/hup/tests/rollbacks.js

@@ -258,14 +258,26 @@ module.exports = {
 
 				await this.worker.rebootDut(this.link);
 
-				// system.waitForServiceState times out here for some reason, so just use shell
-				await this.worker.executeCommandInHostOS(
-					['while [ "$(systemctl is-active rollback-altboot)" != "inactive" ]',
-						'|| [ "$(systemctl is-active rollback-health)" != "inactive" ]; do sleep 1; done'
-					],
-					this.link,
-				);
-
+				await this.utils.waitUntil(async () => {
+					console.log(`Waiting for rollback-altboot service to be inactive...`)	
+					let state = await this.worker.executeCommandInHostOS(
+						`systemctl is-active rollback-altboot`,
+						this.link
+					)
+
+					return (state === "inactive");
+				})
+
+				await this.utils.waitUntil(async () => {
+					console.log(`Waiting for rollback-health service to be inactive...`)	
+					let state = await this.worker.executeCommandInHostOS(
+						`systemctl is-active rollback-health`,
+						this.link
+					)
+
+					return (state === "inactive");
+				})
+
 				await test.resolves(
 					this.utils.waitUntil(async () => {
 						return this.worker.executeCommandInHostOS(