Code review comment for ~sylvain-pineau/plainbox-provider-snappy:cleanup_duplicates

The merge was fine but running tests failed.

[trusty] starting container
[trusty] (timing) 0.08user 0.01system 0:06.28elapsed 1%CPU (0avgtext+0avgdata 16636maxresident)k
[trusty] (timing) 0inputs+32outputs (0major+5614minor)pagefaults 0swaps
[trusty] provisioning container
[trusty] (timing) 37.27user 14.30system 1:27.76elapsed 58%CPU (0avgtext+0avgdata 69364maxresident)k
[trusty] (timing) 0inputs+1616624outputs (16major+1363858minor)pagefaults 0swaps
[trusty-testing] Starting tests...
Found a test script: ./requirements/container-tests-provider-snappy
[trusty-testing] container-tests-provider-snappy: FAIL
[trusty-testing] stdout: https://paste.ubuntu.com/25024433/
[trusty-testing] stderr: https://paste.ubuntu.com/25024434/
[trusty-testing] (timing) Command exited with non-zero status 1
[trusty-testing] (timing) 6.24user 0.51system 0:09.80elapsed 68%CPU (0avgtext+0avgdata 44144maxresident)k
[trusty-testing] (timing) 0inputs+69816outputs (0major+36174minor)pagefaults 0swaps
[trusty-testing] Fixing file permissions in source directory
[trusty-testing] Destroying container
Name: trusty-testing
State: STOPPED
[xenial] starting container
[xenial] (timing) 0.07user 0.02system 0:04.27elapsed 2%CPU (0avgtext+0avgdata 16676maxresident)k
[xenial] (timing) 0inputs+32outputs (0major+5290minor)pagefaults 0swaps
[xenial] provisioning container
[xenial] (timing) 70.78user 19.13system 2:14.92elapsed 66%CPU (0avgtext+0avgdata 107732maxresident)k
[xenial] (timing) 24inputs+2564832outputs (2major+2357284minor)pagefaults 0swaps
[xenial-testing] Starting tests...
Found a test script: ./requirements/container-tests-provider-snappy
[xenial-testing] container-tests-provider-snappy: FAIL
[xenial-testing] stdout: https://paste.ubuntu.com/25024441/
[xenial-testing] stderr: https://paste.ubuntu.com/25024442/
[xenial-testing] (timing) Command exited with non-zero status 1
[xenial-testing] (timing) 6.39user 0.55system 0:09.47elapsed 73%CPU (0avgtext+0avgdata 42364maxresident)k
[xenial-testing] (timing) 0inputs+69816outputs (0major+37446minor)pagefaults 0swaps
[xenial-testing] Fixing file permissions in source directory
[xenial-testing] Destroying container
Name: xenial-testing
State: STOPPED