Set password auth in 50-cloud-init.conf for CentOS and RHEL systems

Azure 'reset password' feature overrides the /etc/ssh/sshd_config file and sets
the PasswordAuthentication to 'yes'. Unfortunately, cloud-init versions 22.3 and
newer sets 'PasswordAuthentication' to 'no' in the
/etc/ssh/sshd_config.d/50-cloud-init.conf which overrides the setting in
/etc/ssh/sshd_config file. VMAccess handles this for Ubuntu by setting
PasswordAuthentication to 'yes' additionally in /etc/ssh/sshd_config.d/50-cloud-init.conf
file. This change extends the same method to include CentOS and RHEL systems.

Fixes: canonical/cloud-init#4335

Signed-off-by: Ani Sinha <anisinha@redhat.com>

VMAccess/vmaccess.py

@@ -382,10 +382,12 @@ def _allow_password_auth():
     _set_sshd_config(config, "PasswordAuthentication", "yes")
     ext_utils.replace_file_with_contents_atomic(SshdConfigPath, "\n".join(config))
 
-    if isinstance(MyDistro, dist_utils.UbuntuDistro): #handle ubuntu 22.04 (sshd_config.d directory)
+    if isinstance(MyDistro, dist_utils.UbuntuDistro) or \ #handle ubuntu 22.04 (sshd_config.d directory)
+       isinstance(MyDistro, dist_utils.RedhatDistro) or \
+       isinstance(MyDistro, dist_utils.CentOSDistro):
         cloudInitConfigPath = "/etc/ssh/sshd_config.d/50-cloud-init.conf"
         config = ext_utils.get_file_contents(cloudInitConfigPath)
-        if config is not None: #other versions of ubuntu don't contain this file
+        if config is not None:
             config = config.split("\n")
             _set_sshd_config(config, "PasswordAuthentication", "yes")
             ext_utils.replace_file_with_contents_atomic(cloudInitConfigPath, "\n".join(config))