Delete directory markers with rm -r

[jtratner]

Right now if you have an application/directory marker like this one:

›› swift stat --os-tenant-name=AUTH_acct Cont ObjDirectory
               Account: AUTH_acct
             Container: Cont
                Object: ObjDirectory
          Content Type: application/directory
        Content Length: 0

issuing

stor rm -r swift://AUTH_acct/Cont/ObjDirectory

will not cause that marker to be deleted, because we don't check for it.

Thus we need to essentially say that:

stor rm -r swift://AUTH_acct/Cont/ObjDirectory

also implies that we delete the object (i.e.):

stor rm swift://AUTH_acct/Cont/ObjDirectory

credit to Sanjay for noticing the bug.