[xwiki-notifications] [Issue] Created: (XWIKI-2274) Option to deactivate versioning doesn't work

[Artem Melentev (JIRA)]

Option to deactivate versioning doesn't work
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                 Key: XWIKI-2274
                 URL: http://jira.xwiki.org/jira/browse/XWIKI-2274
             Project: XWiki Core
          Issue Type: Bug
          Components: Storage
    Affects Versions: 1.4 M1
            Reporter: Artem Melentev
            Priority: Minor


The option "xwiki.store.versioning=0" throws NPEs  because of versioningStore=null.

We can simply implement "mocked" versioningStore to fix it.


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