FUEL 6.0 ISO with default config.mk cannot be built due to missed packages

[Andrey Bubyr]

Testded on fresh installation of Ubuntu 12.04.5 server with latest updates.
How to reproduce:
1) git clone https://github.com/stackforge/fuel-main; staying on master branch
2) cd fuel-main; ./prepare-build-env.sh
3) make iso (with default config.mk - http://paste.openstack.org/show/121455/)
Got error:
  grep -v '^looking for' | tee /home/ubuntu/fuel-main/build/mirror/centos/yumdownloader_src.log
# Yumdownloader/repotrack workaround number one:
# i686 packages are downloaded by mistake. Remove them
rm -rf /home/ubuntu/fuel-main/local_mirror/centos/os/x86_64/Packages/*.i686.rpm
# Yumdownloader workaround number two:
# yumdownloader should fail if some packages are missed
test `grep "No Match" /home/ubuntu/fuel-main/build/mirror/centos/yumdownloader.log | wc -l` = 0
make: *** [/home/ubuntu/fuel-main/build/mirror/centos/yum.done] Error 1

grep "No Match" /home/ubuntu/fuel-main/build/mirror/centos/yumdownloader.log says:
No Match for argument murano-api
No Match for argument python-prettytable
No Match for argument sahara-dashboard

Full yumdownloader.log in attachment.
Please, ensure, that you have updated requirements-rpm.txt and repositories properly.