This revert is not related to the build namespace. Need revert.
This reverts commit 9803b4594018667429126c8cf6d7913e2ed24370.
Change-Id: Ic1759e02287e0272b1f5901c94f204cf7b4844aa
The oslo configuration generates containers that default namespace
to kolla instead of kollaglue docker hub registry upstream.
The impact of this bug is that when using oslo config generator,
the default containers can't be launched.
Change-Id: I29a75874af0453df89eca6d6a9294441204d85f5
Closes-Bug: #1590619