RHV Self Hosted Engine failing to deploy not meeting minimum memory requirements

Issue

• During the deployment, the hosted-engine script is failing because it does not meet the minimum memory requirements.

  [ INFO  ] TASK [ovirt.hosted_engine_setup : Fail if available memory is less then the minimal requirement]
  [ ERROR ] fatal: [localhost]: FAILED! => {"changed": false, "msg": "Available memory ( {'failed': False, 'changed': False, 'ansible_facts': {u'max_mem': u'574818'}}MB ) is less then the minimal requirement (4096MB). Be aware that 512MB is reserved for the host and cannot be allocated to the engine VM."}
  [ ERROR ] Failed to execute stage 'Closing up': Failed executing ansible-playbook
  

• The deploying host has adequate amount of memory available

  # free -m
                total        used        free      shared  buff/cache   available
  Mem:         579977        4705      571899          10        3371      574211
  Swap:          8255           0        8255