Description of problem:
traceback when updating existing repo with new option --database + --groupfile

Version-Release number of selected component (if applicable):
createrepo-0.9.7-1.fc11.noarch
presto-utils-0.3.4-2.fc11.noarch
yum-3.2.22-4.fc11.noarch

How reproducible:
always

Steps to Reproduce:
1. 
# createrepo --deltas --oldpackagedirs=/tmp/old/porkchop.redhat.com/released/F-11/Beta/Fedora/i386/os/Packages/ /tmp/new/download.englab.brq.redhat.com/pub/fedora/linux/development/i386/os/Packages/
2.
# then update repo with groupfile and using swith --database
createrepo --update --database --groupfile=/tmp/new/download.englab.brq.redhat.com/pub/fedora/linux/development/i386/os/repodata/108b79c10bd0b221bbecea03fcc2766fb4e0c5aea3dc45bc87fea769ea78b62f-comps-rawhide.xml --deltas --oldpackagedirs=/tmp/old/porkchop.redhat.com/released/F-11/Beta/Fedora/i386/os/Packages/ /tmp/new/download.englab.brq.redhat.com/pub/fedora/linux/development/i386/os/Packages 
3. traceback
  
Actual results:
[root@hp-dl360g5-01 old]# createrepo --update --database --groupfile=/tmp/new/download.englab.brq.redhat.com/pub/fedora/linux/development/i386/os/repodata/108b79c10bd0b221bbecea03fcc2766fb4e0c5aea3dc45bc87fea769ea78b62f-comps-rawhide.xml --deltas --oldpackagedirs=/tmp/old/porkchop.redhat.com/released/F-11/Beta/Fedora/i386/os/Packages/ /tmp/new/download.englab.brq.redhat.com/pub/fedora/linux/development/i386/os/Packages/
13250/13250 - torque-gui-2.1.10-7.fc11.i586.rpm                                 
Saving Primary metadata
Saving file lists metadata
Saving other metadata
Saving delta metadata
Generating sqlite DBs
Traceback (most recent call last):
  File "/usr/share/createrepo/genpkgmetadata.py", line 222, in <module>
    main(sys.argv[1:])
  File "/usr/share/createrepo/genpkgmetadata.py", line 200, in main
    mdgen.doRepoMetadata()
  File "/usr/lib/python2.6/site-packages/createrepo/__init__.py", line 805, in doRepoMetadata
    os.rename(tmp_result_path, resultpath)
OSError: [Errno 2] No such file or directory
[root@hp-dl360g5-01 old]# which createrepo
/usr/bin/createrepo
[root@hp-dl360g5-01 old]# rpm -qf /usr/bin/createrepo
createrepo-0.9.7-1.fc11.noarch


Expected results:
db is updated with new groupfile

Additional info: