Plone.app.workflow

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- Remove DL's from portal message in templates.
[khink]

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- Show login-name even if it is the same as the user-id.
Fixes https://dev.plone.org/ticket/14259
[pbauer]

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- Introduce ``plone.app.workflow.interfaces.ILocalrolesModifiedEvent``.
``LocalrolesModifiedEvent`` gets fired after local roles have been changed.
[rnix]

- Introduce ``required_interface`` attribute on
``plone.app.workflow.interfaces.ISharingPageRole``.
[rnix]

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- Remove DL's from portal message in templates.
https://github.com/plone/Products.CMFPlone/issues/153
[khink]

- Replace deprecated test assert statements.
[timo]

- Show user's login name instead of the user id, which is an internal
identifier.
[davisagli]

- Include roles derived from borg.localrole adapters on the Sharing tab,
appearing as inherited roles.
[datakurre, davisagli]

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- Add json header to sharing.py.
[travacic]

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- Call searchUsers with the 'name' argument instead of 'login'.
'name' is the officially supported way according to the PAS interface.
[maurits]