devstack run_tests.sh fails on Ubuntu xenial

[Masanori Itoh]

On Ubuntu xenial, run_tests.sh fails because of an ERROR of the 'test against removed package'
in 'tests/test_functions.sh'.

This comes from a dependency change of xenial 'cowsay' package that is used in the test above.
That is, now cowsay has a reverse dependency from 'cowsay-off', and it makes package removal to fail.

Please see the attached terminal log.

I would suggest to change the package from 'cowsay' to 'dvorak7min'
because dvorak17min is enough small (around 20KB) and it would be stable
(not likely to have dependency changes in future).
If it makes sense, I will work on this.

 | root@xenial:~# dpkg -l | grep cowsay
 | root@xenial:~# apt-get install cowsay
 | Reading package lists... Done
 | Building dependency tree
 | Reading state information... Done
 | The following additional packages will be installed:
 | cowsay-off
 | Suggested packages:
 | filters
 | The following NEW packages will be installed:
 | cowsay cowsay-off
 | 0 upgraded, 2 newly installed, 0 to remove and 108 not upgraded.
 | Need to get 0 B/21.7 kB of archives.
 | After this operation, 112 kB of additional disk space will be used.
 | Do you want to continue? [Y/n] y
 | Selecting previously unselected package cowsay.
 | (Reading database ... 105750 files and directories currently installed.)
 | Preparing to unpack .../cowsay_3.03+dfsg1-15_all.deb ...
 | Unpacking cowsay (3.03+dfsg1-15) ...
 | Selecting previously unselected package cowsay-off.
 | Preparing to unpack .../cowsay-off_3.03+dfsg1-15_all.deb ...
 | Unpacking cowsay-off (3.03+dfsg1-15) ...
 | Processing triggers for man-db (2.7.5-1) ...
 | Setting up cowsay (3.03+dfsg1-15) ...
 | Setting up cowsay-off (3.03+dfsg1-15) ...
 | root@xenial:~#
 | root@xenial:~#
 | root@xenial:~# dpkg -P cowsay
 | dpkg: dependency problems prevent removal of cowsay:
 | cowsay-off depends on cowsay (>= 3.03+dfsg1-13).
 | |
 | dpkg: error processing package cowsay (--purge):
 | dependency problems - not removing
 | Errors were encountered while processing:
 | cowsay
 | root@xenial:~#

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/357325

[Sean Dague (sdague)]

This devstack bug was last updated over 180 days ago, as devstack
is a fast moving project and we'd like to get the tracker down to
currently actionable bugs, this is getting marked as Invalid. If the
issue still exists, please feel free to reopen it.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Jens Harbott (frickler) (<email address hidden>) on branch: master
Review: https://review.openstack.org/357325
Reason: The patch has been in merge conflict for a long time, feel free to restore the patch and continue working on it