print filepath on 304 response code

[xdavidson]

Currently filepath is not printed out as part of standard output when Uploader receives a http response code 304. This PR allows us to see the filepath on stdout for 304.

[codecov-commenter]

Codecov Report

Merging #376 into master will increase coverage by 0.08%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #376      +/-   ##
============================================
+ Coverage     58.80%   58.88%   +0.08%     
- Complexity      444      449       +5     
============================================
  Files           113      116       +3     
  Lines          3663     3675      +12     
  Branches        524      526       +2     
============================================
+ Hits           2154     2164      +10     
- Misses         1403     1406       +3     
+ Partials        106      105       -1     

Flag	Coverage Δ	Complexity Δ
#java	58.88% <ø> (+0.08%)	449.00 <ø> (+5.00)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
.../java/com/redhat/pantheon/model/module/Module.java	80.00% <0.00%> (-20.00%)	4.00% <0.00%> (-1.00%)
...om/redhat/pantheon/extension/HydraIntegration.java	0.00% <0.00%> (ø)	0.00% <0.00%> (ø%)
...edhat/pantheon/asciidoctor/AsciidoctorService.java	3.90% <0.00%> (ø)	3.00% <0.00%> (ø%)
...t/pantheon/model/api/SlingModelAdapterFactory.java	93.33% <0.00%> (ø)	6.00% <0.00%> (ø%)
.../extension/events/ModuleVersionPublishedEvent.java
...xtension/events/ModuleVersionUnpublishedEvent.java
...dhat/pantheon/servlet/module/UnpublishVersion.java
...tension/events/ModuleVersionPublishStateEvent.java
...t/pantheon/servlet/module/PublishDraftVersion.java
...m/redhat/pantheon/servlet/PublishDraftVersion.java	50.00% <0.00%> (ø)	12.00% <0.00%> (?%)
... and 9 more

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[aprajshekhar]

@xdavidson it will be great if you could add the same change to https://github.com/redhataccess/pantheon-uploader as well. Thanks in advance.