XWIKI-4845: With the XAR import degraded UI (no JS or IE6) if you deselect all files and press Import, all files will be imported
(cherry picked from commit 9ef6d52ac35f5d7fc33ca57dea9b1822801e49d6)
XWIKI-8397: When the workspace owner is changed, the new owner is not added as a member nor in the admin group
(cherry picked from commit 520a60f828f35ec3b04127748d3fc4a2a6f0a02c)
[misc] Using .* static imports in solr test, instead of individual ones.
(cherry picked from commit 551a72170de8d25c31294a784c6bf4e02c3bdec9)