fix: permission denied when modifying temporary hosts file

[iromli]

The updatelbip.py script unable to modify /etc/hosts.back due to permission issue.

See the following lines:

cloud-native-edition/pygluu/kubernetes/templates/helm/gluu/charts/config/templates/configmaps.yaml

Lines 389 to 396 in aa0b30c

	def backup(hosts):
	timenow = time.strftime("%c")
	timestamp = "Backup occurred %s \n" % timenow
	logger.info("Backing up hosts file to /etc/hosts.back ...")
	with open('/etc/hosts.back', 'a+') as f:
	f.write(timestamp)
	for line in hosts:
	f.write(line)

The location of this file should be moved elsewhere to directory where entrypoint has sufficient access, i.e. /etc/certs.