Hotfix installation

Please make sure you consult the page Hotfix Installation Notes for any additional actions needed to complete the installation.

Main correction(s) provided

• Fix substringMatchType (subinitial / subany / subfinal) not being honored by user/group search when the user or group directory is a multi-directory (nuxeo.directory.type=multi).

Improvement(s)

• Return a 409 status code if an exclusive Bulk Action is already running
• A blobDigestSkipped event is fired when digest is not computed due to threshold
• Added a cache for token authentication lookups, avoiding a directory query on every authenticated request.