Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  e8b39e3bbce2ff113d025a3a9df5d0c435cf0fd5
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(minor) adjusting client selenium tests for dispatcher script

- in order to keep the selenium tests working together with the
new dispatcher script (instead of pollForChanges), we need
to reload the client page twice to run the jobs in the queue

Change-Id: I8d283dcc9429b87673c033f917782f6a908b3dc6