[testrail] Stats generation script fails: 'TypeError: string indices must be integers, not str'

[Artem Panchenko]

Stats generation script fails for test plans which contain links to original bug along with links to its duplicates (for different results):

Traceback (most recent call last):
  File "fuelweb_test/testrail/generate_statistics.py", line 526, in <module>
    sys.exit(main())
  File "fuelweb_test/testrail/generate_statistics.py", line 504, in main
    stats = generator.dump()
  File "fuelweb_test/testrail/generate_statistics.py", line 303, in dump
    if not t['blocked']])
TypeError: string indices must be integers, not str

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/283559

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/8.0
Review: https://review.openstack.org/283563

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/283559
Committed: https://git.openstack.org/cgit/openstack/fuel-qa/commit/?id=9c6e6a1cd4a8620ed8c81c2f332484ea29953399
Submitter: Jenkins
Branch: master

commit 9c6e6a1cd4a8620ed8c81c2f332484ea29953399
Author: Artem Panchenko <email address hidden>
Date: Tue Feb 23 13:26:17 2016 +0200

    Fix Type error in TestRail stats generator

    Change-Id: Ie4ff2f314c3b8a78b8ed963fc2f36e30d48c21c9
    Closes-bug: #1548769

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/283563
Committed: https://git.openstack.org/cgit/openstack/fuel-qa/commit/?id=0a8d0b3103f02b7111c45e18d4195113a5516415
Submitter: Jenkins
Branch: stable/8.0

commit 0a8d0b3103f02b7111c45e18d4195113a5516415
Author: Artem Panchenko <email address hidden>
Date: Tue Feb 23 13:26:17 2016 +0200

    Fix Type error in TestRail stats generator

    Change-Id: Ie4ff2f314c3b8a78b8ed963fc2f36e30d48c21c9
    Closes-bug: #1548769