BNetworkRoster::RemoveInterface() on non-existing interface KDLs

[pulkomandy]

Compile the netapi tests and run NetworkIntrefaceTest using the UnitTester. Result is a non-continuable KDL.

The test is trying (in setUp) to remove the "loopTest" interface, to make sure it doesn't exist, before creating it. This should probably not bring the whole kernel down.

[anevilyak]

This sounds like the same issue as reported in #10919, though without the actual KDL attached it's hard to say for certain.

[jackburton]

ifconfig calls BNetworkRoster::RemoveInterface(), so I guess the cause it's the same, although the interface DOES exist in #10919.

[waddlesplash]

Still occurs indeed (attached screenshot from VMware.)