Fix resubmit

[sebdg]

This fixes an issue in resubmit.
The filepath taken is the temporary file used to submit.
Once analyized another copy is held in the analysis folder.
That one remains available to download.

Fix #1644 for sure
Fix #1370 also,

[coveralls]

Coverage increased (+0.009%) to 61.889% when pulling d5e61ed on sebdg:fix_resubmit into 78a1e7d on cuckoosandbox:master.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@df55177). Click here to learn what that means.
The diff coverage is 87.5%.

@@            Coverage Diff            @@
##             master    #2001   +/-   ##
=========================================
  Coverage          ?   61.88%           
=========================================
  Files             ?      149           
  Lines             ?    14833           
  Branches          ?        0           
=========================================
  Hits              ?     9180           
  Misses            ?     5653           
  Partials          ?        0

Impacted Files	Coverage Δ
cuckoo/web/controllers/submission/routes.py	90.9% <100%> (ø)
cuckoo/web/utils.py	67.77% <80%> (ø)

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[jbremer]

This has been manually merged into the 2.0.7 release, thanks!