devtest fails with os-apply-config when DIB_PIP_MANIFEST_os_apply_config set

[Coleman Corrigan]

devtest fails when the DIB_PIP_MANIFEST_os_[apply/collect/refresh]_config environment variables are set to point at a valid manifest set for these.

The failure is reported as:
{code}
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.11.0-19-generic /boot/vmlinuz-3.11.0-19-generic
update-initramfs: Generating /boot/initrd.img-3.11.0-19-generic
df: Warning: cannot read table of mounted file systems: No such file or directory
run-parts: executing /etc/kernel/postinst.d/update-notifier 3.11.0-19-generic /boot/vmlinuz-3.11.0-19-generic
run-parts: executing /etc/kernel/postinst.d/x-grub-legacy-ec2 3.11.0-19-generic /boot/vmlinuz-3.11.0-19-generic
Searching for GRUB installation directory ... found: /boot/grub
findfs: unable to resolve 'LABEL=cloudimg-rootfs'
Cannot determine root device. Assuming /dev/hda1
This error is probably caused by an invalid /etc/fstab
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Found kernel: /boot/vmlinuz-3.11.0-19-generic
Found kernel: /boot/memtest86+.bin
Updating /boot/grub/menu.lst ... done

run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.11.0-19-generic /boot/vmlinuz-3.11.0-19-generic
Setting up linux-image-generic (3.11.0.19.20) ...
dib-run-parts Wed Apr 9 15:11:31 UTC 2014 10-support-physical-hardware completed
dib-run-parts Wed Apr 9 15:11:31 UTC 2014 Running /tmp/in_target.d/install.d/11-create-template-root
++ os-apply-config --print-templates
/tmp/in_target.d/install.d/11-create-template-root: line 5: os-apply-config: command not found
+ TEMPLATE_ROOT=
{code}

The issue is to do with failure to activate virtualenvs, and a fix is proposed at: https://review.openstack.org/#/c/84810/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/84810
Committed: https://git.openstack.org/cgit/openstack/tripleo-image-elements/commit/?id=2e1730b16fb690044fc85df98dfe37cd72b21819
Submitter: Jenkins
Branch: master

commit 2e1730b16fb690044fc85df98dfe37cd72b21819
Author: Coleman Corrigan <email address hidden>
Date: Wed Apr 2 18:14:07 2014 +0100

    Activate venvs in os-*-config elements source install

      This updates the source install scripts for os-apply collect and
      refresh config elements to activate their virtualenvs before
      performing pip installs, as without this specifing a manifest for
      e.g. os-apply-config breaks devtest build

    Closes-bug: #1305151
    Change-Id: I3c42de180f76fb122637c801541f14e50169de89