Update HC4 to latest.

That contains among many bugfixes contains
the fix for HTTPCLIENT-1448 too.
NEXUS-6271: Make Tika recognize empty ZIP file and UT

The test renamed back to UT from IT, as it was chatty with MimeUtil2
in place but now with Tika is not and is fast.
[NX-197] Implement download of exported events zip
Return the exported zip not the tmp file
Reuse FileCreated from wonderland (shared now with analytics)
refine genscripts to thread so we can shit events out faster
Mask viewport when exporting
Zip -> ZIP
Use application directories helper.  Notes about fixing up download directory.  Use timestamp-counter for file name.
Merge pull request #379 from sonatype/NX-197-analytics-download

REVIEW: [NX-197] Implement download of exported events zip
forgot some jacksbeen deps, use 1.3
Merge pull request #376 from sonatype/update-hc4

Update HC4 to latest
Merge pull request #378 from sonatype/NEXUS-6271-empty-zip

NEXUS-6271: Make Tika recognize empty ZIP file and UT
Merge remote-tracking branch 'origin/master' into realm-caches
Tidy up.