Fix eclipse marketplace issue installation for photon

a new script has been deployed to eclipse marketplace that test installs in various base platform.

the installation for eclipse photon base fails with the following log [1] using update site url [2] .

[1]

The installable unit with id 'org.jboss.tools.openshift.io.feature' cannot be resolved in the repository:
  http://download.jboss.org/jbosstools/photon/stable/updates/?old

[2] http://download.jboss.org/jbosstools/photon/stable/updates/?old