Undercloud deployment with SSL fails if SELinux is in enforcing mode

Issue

• undercloud installation fails with an error:

$ openstack undercloud install
[...]
+ openstack role show ResellerAdmin
WARNING: keystoneclient.auth.identity.generic.base Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
WARNING: keystoneclient.auth.identity.generic.base Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
WARNING: keystoneclient.auth.identity.generic.base Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
ERROR: openstack Could not determine a suitable URL for the plugin
+ openstack role create ResellerAdmin
WARNING: keystoneclient.auth.identity.generic.base Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
WARNING: keystoneclient.auth.identity.generic.base Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
ERROR: openstack Could not determine a suitable URL for the plugin
[2015-08-18 11:56:20,171] (os-refresh-config) [ERROR] during post-configure phase. [Command '['dib-run-parts', '/usr/libexec/os-refresh-config/post-configure.d']' returned non-zero exit status 1]

[2015-08-18 11:56:20,172] (os-refresh-config) [ERROR] Aborting...
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 526, in install
    _run_orc(instack_env)
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 461, in _run_orc
    _run_live_command(args, instack_env, 'os-refresh-config')
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 297, in _run_live_command
    raise RuntimeError('%s failed. See log for details.', name)
RuntimeError: ('%s failed. See log for details.', 'os-refresh-config')
ERROR: openstack Command 'instack-install-undercloud' returned non-zero exit status 1