Multiple components on a card break collect_jira

With cards like http://cards.linaro.org/browse/CARD-372 which have multiple components, collect_jira fails with the following traceback:

Traceback (most recent call last):
  File "./collect_jira", line 229, in <module>
    main()
  File "./collect_jira", line 219, in main
    jira_import(collector, cfg, opts)
  File "./collect_jira", line 107, in jira_import
    assert len(components) == 1
AssertionError