Adding HE host gets deployed as normal host

Issue

• While adding an additional HE host, the procedure doesn't fail but the host gets installed as a regular host, thus, it won't be eligible to run a HE VM.
• engine.log shows:

ERROR [org.ovirt.engine.core.bll.hostedengine.HostedEngineConfigFetcher] (default task-37) [44de8355] Failed to fetch the hosted engine config disk due to {}: java.util.concurrent.ExecutionException: org.ovirt.e
ngine.core.common.errors.EngineException: EngineException: Failed to download the HE configuration disk (Failed with error ENGINE and code 5001)

ERROR [org.ovirt.engine.core.bll.storage.disk.image.RetrieveImageDataCommand] (ForkJoinPool.commonPool-worker-2) [41eeb0d0] Command 'org.ovirt.engine.core.bll.storage.disk.image.RetrieveImageDataCommand' failed:
 EngineException: org.ovirt.engine.core.vdsbroker.vdsbroker.VDSErrorException: VDSGenericException: VDSErrorException: received downloaded data size is wrong (requested 20480, received 10240) (Failed with error GeneralException and code 1
00)