[fuel-ci] syntax check script does not work as expected for removed modules

[Aleksandr Didenko]

We can fail to "pushd" into removed module and run syntax check inside 'fuel-library' globally.

https://review.openstack.org/#/c/165766/ patch fails to pass fuel_review_syntax_check https://fuel-jenkins.mirantis.com/job/fuellib_review_syntax_check/7787/consoleFull because of this issue.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/166906

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/166906
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=f5d0e15f48d4f6ecec09df87e031474cef734a17
Submitter: Jenkins
Branch: master

commit f5d0e15f48d4f6ecec09df87e031474cef734a17
Author: Aleksandr Didenko <email address hidden>
Date: Mon Mar 23 17:59:01 2015 +0200

    Don't run syntax/unit tests for removed modules

    We're running syntax and unit tests for changed modules only.

    But for removed modules, we fail to 'pushd $mod' and thus run test
    functions inside current working directory, which is not correct.

    We should test if changed module dir exists before trying to run
    tests for it.

    Fuel-CI: disable

    Change-Id: If1ab6850943b7aed7a48479625d8daa0243594f6
    Closes-bug: #1435401