Description of problem: Running `ipa-server-install --forwarder=<host>` creates
an entry in /etc/named.conf and a working configuration, however it does not
place that entry in 389 Directory, making therefore inaccessible by the IdM Web
UI and the `ipa dnsconfig-show` command.


Version-Release number of selected component (if applicable):
IdM 4.2.0 on RHEL 7.2

How reproducible:
Tested once

Steps to Reproduce:
1. Set up an IdM Sever and specify DNS forwarder.
# ipa-server-install --forwarder=<host>

2. Validate the forwarder host is present in /etc/named.conf [GOOD]

3. Validate name resolution requiring forwarder using dig [GOOD]
Note: pcap confirms resolution is using forwarders

4) Probe 389 Directory for forwarder entries [BROKEN]
# ipa dnsconfig-show
EXPECTED: display forwarder host address

5) Probe WebUI for forwarder entries [BROKEN]
Network Services > DNS > DNS Global Configuration
EXPECTED: display forwarder host address


Actual results:
no forwarder host address displayed

Expected results:
display forwarder host address

Additional info:
We configured IPA server to use 2 DNS forwarders.