Combine groupadd and useradd into a single layer
Combine groupadd and useradd into a single layer

Co-authored-by: Matyas Selmeci <758a39d38713eb13da8aae3b2ae37987c8e7b307@cs.wisc.edu>
htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor