db_manage script fails to clean subnet zk allocation

[Édouard Thuleau]

Traceback (most recent call last):
  File "db_manage.py", line 1772, in <module>
    main(verb, sys.argv)
  File "db_manage.py", line 1755, in main
    return globals()['db_%s' %(verb)](' '.join(sys.argv[1:]))
  File "db_manage.py", line 1725, in db_clean
    db_cleaner.clean_subnet_addr_alloc()
  File "db_manage.py", line 1103, in wrapper
    errors = func(*args, **kwargs)
  File "db_manage.py", line 1402, in clean_subnet_addr_alloc
    zk_all_vns[vn].pop(sn_key)
KeyError: u'default-domain:demo:snat-si-left_snat_7b68d990-b3a2-4c6c-bdd8-aa2342197e6d_671ad4f6-14b1-4a20-8604-68b6c30c8831'

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/32665
Submitter: ?douard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/32665
Committed: http://github.com/Juniper/contrail-controller/commit/006bf6c945d723c52b3388a2ed74d3599b4b5552
Submitter: Zuul (<email address hidden>)
Branch: master

commit 006bf6c945d723c52b3388a2ed74d3599b4b5552
Author: Édouard Thuleau <email address hidden>
Date: Thu Jun 8 19:18:49 2017 +0200

[Config] fix db_manage scripts subnet zk allocation

Change-Id: Iba5936ce5b8bcff80ec18c01149ee7c7e5bdef20
Closes-Bug: #1696806