Description of problem:
In RHEL-8, if /dev/sdb file system is ntfs, the mount error message is something like:
mount: /run/cloud-init/tmp/tmp_c2xx79y: unknown filesystem type 'ntfs'.
But the match string in patch ci-Azure-Ignore-NTFS-mount-errors-when-checking-ephemer.patch is:
 if "mount: unknown filesystem type 'ntfs'" in str(e):
which cannot match the string.
In RHEL-7.6 it can match the string.

If modify the match string as:
 if "unknown filesystem type 'ntfs'" in str(e):
It works well.

Version-Release number of selected component (if applicable):
cloud-init-18.2-3.el8.noarch

RHEL Version:
RHEL-8.0-20181220.1

How reproducible:
100%

Steps to Reproduce:
1. Prepare a RHEL-8 VM in Azure with cloud-init-18.2-3.el8.noarch installed. Disable or remove WALA.
2. Stop && Start VM from Azure portal
3. Login and check if /dev/sdb1 is mounted

Actual Result:
/dev/sdb1 is not mounted

Expect Result:
/dev/sdb1 is mounted to /mnt

# cat /var/log/cloud-init.log:
2019-01-07 03:19:09,969 - util.py[DEBUG]: Running command ['mount', '-o', 'ro,sync', '-t', 'ntfs', '/dev/sdb1', '/run/cloud-init/tmp/tmp_c2xx79y'] with allowed return codes [0] (shell=False, capture=True)
2019-01-07 03:19:09,976 - util.py[DEBUG]: Failed mount of '/dev/sdb1' as 'ntfs': Unexpected error while running command.
Command: ['mount', '-o', 'ro,sync', '-t', 'ntfs', '/dev/sdb1', '/run/cloud-init/tmp/tmp_c2xx79y']
Exit code: 32
Reason: -
Stdout:
Stderr: mount: /run/cloud-init/tmp/tmp_c2xx79y: unknown filesystem type 'ntfs'.
2019-01-07 03:19:09,977 - DataSourceAzure.py[DEBUG]: reformattable=False: partition 1 (/dev/sdb1) on device /dev/disk/cloud/azure_resource was ntfs formatted but mount of 1 failed: Failed mounting /dev/sdb1 to /run/cloud-init/tmp/tmp_c2xx79y due to: Unexpected error while running command.
Command: ['mount', '-o', 'ro,sync', '-t', 'ntfs', '/dev/sdb1', '/run/cloud-init/tmp/tmp_c2xx79y']
Exit code: 32
Reason: -
Stdout:
Stderr: mount: /run/cloud-init/tmp/tmp_c2xx79y: unknown filesystem type 'ntfs'.

Additional Info: 
None