There has been a problem with iproute package that resulted in errors
when deleting the namespaces, so deleting was turned off by default.
According to tests with iproute version 3.12.0 there is no such issue
so the option could be safely turned on by default.
DocImpact
Related-Bug: #1052535
Related-Bug: #1402739
Change-Id: I4c831f98fb2462382ef0f9216e265555186b965a