test: Add a test for non-root user's capabilities
test: Add a test for non-root user's capabilities

The test checks that a non-root uid has no effective capabilities.
In other words, ambient capabilities are not in effect.

Signed-off-by: Mrunal Patel <d389837b018b67489df74a2c5f0aca13aaed44b6@gmail.com>

nalind/cri-o,vbatts/cri-o,rhatdan/cri-o,rhatdan/cri-o,mikebrow/cri-o,jwhonce/ocid,vbatts/cri-o,rhatdan/cri-o,jwhonce/ocid,mikebrow/cri-o,rhatdan/cri-o,kubernetes-incubator/ocid,kubernetes-incubator/cri-o,kubernetes-incubator/ocid,nalind/cri-o,kubernetes-incubator/cri-o,vbatts/cri-o,kubernetes-incubator/cri-o,vbatts/cri-o,mikebrow/cri-o,nalind/cri-o,jwhonce/ocid,kubernetes-incubator/cri-o,mikebrow/cri-o,kubernetes-incubator/ocid