Add IsUserNamespaceInKernel() test environment condition
Add IsUserNamespaceInKernel() test environment condition

Signed-off-by: Eric Mountain <7fc8ed40e23fcba13e771e5ff7913ff89a4ed835@datadoghq.com>

vdemeester/docker,thaJeztah/docker,djs55/docker,nawawi/docker,jameszhan/docker,cpuguy83/docker,flavio/docker,flavio/docker,docker/docker,mahak/docker,paralin/docker,docker/docker,Ramzec/docker,moul/docker,trebonian/docker,AkihiroSuda/docker,paralin/docker,gnailuy/docker,nawawi/docker,nalind/docker,moby/moby,thaJeztah/docker,Ramzec/docker,yosifkit/docker,cpuguy83/docker,kojiromike/docker,thaJeztah/docker,Mokolea/docker,gnailuy/docker,konstruktoid/docker-upstream,trebonian/docker,yosifkit/docker,Ramzec/docker,bearstech/moby,bearstech/moby,paralin/docker,moby/moby,flavio/docker,cpuguy83/docker,konstruktoid/docker-upstream,jthelin/docker,jimjag/docker,mahak/docker,flavio/docker,trebonian/docker,moby/moby,Mokolea/docker,thaJeztah/docker,jimjag/docker,jthelin/docker,moul/docker,djs55/docker,nalind/docker,moul/docker,trebonian/docker,gnailuy/docker,djs55/docker,AkihiroSuda/docker,nawawi/docker,AkihiroSuda/docker,moul/docker,jameszhan/docker,vdemeester/docker,jimjag/docker,vdemeester/docker,jameszhan/docker,Mokolea/docker,nawawi/docker,kojiromike/docker,jimjag/docker,bearstech/moby,docker/docker,moby/moby,Ramzec/docker,nalind/docker,paralin/docker,yosifkit/docker,yosifkit/docker,cpuguy83/docker,konstruktoid/docker-upstream,AkihiroSuda/docker,bearstech/moby,kojiromike/docker,Mokolea/docker,nalind/docker,gnailuy/docker,konstruktoid/docker-upstream,mahak/docker,mahak/docker