Description of problem:
Package s390utils-iucvterm uses 'grep' in postinstall/postuninstall scriplets, but the package doesn't depend on the grep package:

[root@rtt6 ~]# rpm -q --scripts s390utils-iucvterm | grep grep
grep -q '^/usr/bin/ts-shell$' /etc/shells \
    grep -v '^/usr/bin/ts-shell$' /etc/shells > /etc/shells.ts-new
[root@rtt6 ~]# rpm -qf /bin/grep
grep-2.7-5.fc15.s390x
[root@rtt6 ~]# rpm -q --requires s390utils-iucvterm | grep grep


An error message shows in install.log during installation:
...
Installing libcap-ng-0.6.5-2.fc15.s390x
Installing s390utils-iucvterm-1.8.2-32.fc15.s390x
/var/tmp/rpm-tmp.n7DVD6: line 2: grep: command not found
Installing gamin-0.1.10-9.fc15.s390x
...
Installing grep-2.7-5.fc15.s390x
...

Version-Release number of selected component (if applicable):
s390utils-iucvterm-1.8.2-32.fc15.s390x

How reproducible:
always

Steps to Reproduce:
see description
  
Actual results:
s390utils-iucvterm doesn't depend on grep

Expected results:
s390utils-iucvterm depends grep