0. Download this rpm [1].

[1] http://www.qa.jboss.com/binaries/RHDS/10.0/snapshots/builds/devstudio.rpm_master/20160824-2110/rh-eclipse46-devstudio-1.0-1-20160824-2110.el7.noarch.rpm

1. install:

sudo su
yum reinstall rh-eclipse46-devstudio-1.0-1.el7.noarch.rpm
exit 

2. Check installation occurred:

ls /opt/rh/rh-eclipse46/root/usr/share/eclipse/droplets/devstudio/

3. Run eclipse:

scl enable rh-eclipse46 bash
cd /opt/rh/rh-eclipse46/root/usr/lib64/eclipse/
./eclipse | tee /tmp/rh-eclipse46-devstudio.log.txt

4. Be patient! Initial startup with all the droplets and dropins could take a few minutes.

5. Error occurs on startup of Red Hat Central (JBDS-4020), and if you switch to the Software/Update tab, you get a second error (JBDS-4021).

6. If you dismiss the error, we see that Central has the wrong connectors shown, and worse, none can be installed.