Add function to lookup user in container /etc/{passwd,group}
Add function to lookup user in container /etc/{passwd,group}

Signed-off-by: Mrunal Patel <8d6561672eb74a818dcdfacc4516d6009671ec57@redhat.com>

mikebrow/cri-o,umohnani8/cri-o,mheon/cri-o,mikebrow/cri-o,kubernetes-incubator/cri-o,umohnani8/cri-o,aweiteka/cri-o,rhatdan/cri-o,nalind/cri-o,apilloud/cri-o,vbatts/cri-o,mikebrow/cri-o,kubernetes-incubator/ocid,vbatts/cri-o,rhatdan/cri-o,kubernetes-incubator/cri-o,aweiteka/cri-o,vbatts/cri-o,mheon/cri-o,mheon/cri-o,jwhonce/ocid,kubernetes-incubator/cri-o,14rcole/cri-o,14rcole/cri-o,kubernetes-incubator/ocid,apilloud/cri-o,14rcole/cri-o,kubernetes-incubator/cri-o,umohnani8/cri-o,kubernetes-incubator/ocid,umohnani8/cri-o,aweiteka/cri-o,mheon/cri-o,jwhonce/ocid,rhatdan/cri-o,nalind/cri-o,apilloud/cri-o,rhatdan/cri-o,vbatts/cri-o,nalind/cri-o,jwhonce/ocid,14rcole/cri-o,mikebrow/cri-o