netstat: On teardown, check VMI UID as prefix
netstat: On teardown, check VMI UID as prefix

The condition that checks if a cache entry should be removed or not was
using "contains".
Change it to be more accurate by just checking it is at the prefix.

Signed-off-by: Edward Haas <416ab6a6c3e37a8cab0d365516e79cce8f9be5ad@redhat.com>

kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt