test if RPM database can be initialized anywhere
    
    SELinux interferes with the rpmdb program when executed with the
    --initdb option and with non-default location supplied via --dbpath
    or --root options. These scenarios lead to a RPM database which is
    incomplete.
    
    I believe these scenarios are valid and should be allowed in SELinux
    policy. This TC reproduces these scenarios and looks for any SELinux
    denials that may appear in the meantime.
    
    The TC covers BZ#1901961, BZ#1906289.