Description of problem:
Kickstartable tree synced via `spacewalk-repo-sync --sync-kickstart ...` is marked as invalid by default


Version-Release number of selected component (if applicable):
spacewalk-backend-tools-2.5.3-133.el6sat.noarch


How reproducible:
always


Steps to Reproduce:
1. Have repo http://<mirror>/pub/fedora/linux/releases/25/Server/x86_64/os/ attached to channel  bz1070866
2. # spacewalk-repo-sync -c  bz1070866 --include '' --sync-kickstart
3. Check Systems -> Kickstarts -> Create Kickstart Profile -> select channel "bz1070866"
4. Check Systems -> Kickstarts -> Distributions -> column "Valid?"


Actual results:
For Systems -> Kickstarts -> Create Kickstart Profile -> select channel "bz1070866", new KS is not offered in "Kickstartable Tree:" drop-down menu

For Systems -> Kickstarts -> Distributions, column "Valid?" does not have gree check. You have to open the KS tree first (note the warning box in upper part of the page), do not change anything and click "Update Kickstart Distribution"

Before clicking "Update Kickstart Distribution", the KS is:

rhnschema=# select * from rhnkickstartabletree where label='bz1070866';
 id | org_id |   label   |                base_path                 | channel_id | cobbler_id | cobbler_xen_id |   boot_image   | kstree_type | install_type |         last_modified         |            created            |           modif
ied            
----+--------+-----------+------------------------------------------+------------+------------+----------------+----------------+-------------+--------------+-------------------------------+-------------------------------+----------------
---------------
 23 |      1 | bz1070866 | /var/satellite/rhn/kickstart/1/bz1070866 |        133 |            |                | spacewalk-koan |           2 |            7 | 2017-05-23 07:00:56.693821-04 | 2017-05-23 07:00:56.693821-04 | 2017-05-23 07:0
0:56.693821-04
(1 row)

after clicking it:

rhnschema=# select * from rhnkickstartabletree where label='bz1070866';
 id | org_id |   label   |                base_path                 | channel_id |             cobbler_id              | cobbler_xen_id |   boot_image   | kstree_type | install_type |         last_modified         |            created    
        |           modified            
----+--------+-----------+------------------------------------------+------------+-------------------------------------+----------------+----------------+-------------+--------------+-------------------------------+-----------------------
--------+-------------------------------
 23 |      1 | bz1070866 | /var/satellite/rhn/kickstart/1/bz1070866 |        133 | MTQ5NTUzODA2Ni4yMzEzODAxMTMuMDE1MjE |                | spacewalk-koan |           2 |            7 | 2017-05-23 07:00:56.693821-04 | 2017-05-23 07:00:56.69
3821-04 | 2017-05-23 07:14:26.096889-04
(1 row)


Expected results:
KS should be available right after sync