9.0-pkg-install tests for hotfix branches have failed

Issue:
9.0-pkg-install-centos and 9.0-pkg-install-ubuntu tests for the branch 9.0/mitaka-hotfix-1 of openstack/oslo.messaging failed up with "ERROR: package version in the stable repo is newer" error [0].
Seems that built package version is wrong. It is 4.6.1-3~u14.04+mos8 but should be 4.6.1-3~u14.04+mos8.1 according to spec [1]

[0] https://review.fuel-infra.org/#/c/25666/
[1] https://review.fuel-infra.org/#/c/21267/5/source/specs/hotfix-updates-workflow.rst

Details:
print apt_pkg.version_compare('\''4.6.1-3~u14.04+mos8'\'', '\''4.6.1-3~u14.04+mos9'\'')
'
+ [[ -1 -lt 1 ]]
+ die 'ERROR: package version in the stable repo is newer'
+ echo 'ERROR: package version in the stable repo is newer'
ERROR: package version in the stable repo is newer
+ exit 1
Build step 'Execute shell' marked build as failure