Fix SSLHandshakeException in Visual Recognition

[lpatino10]

There was an SSLHandshakeException occurring in Visual Recognition when using Oracle JDK 7.

This PR makes a change to the core HTTP code to allow Visual Recognition to connect while preserving functionality for users using the IBM JDK.

[codecov-io]

Codecov Report

Merging #890 into master will increase coverage by 0.2%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##             master     #890     +/-   ##
===========================================
+ Coverage     63.95%   64.16%   +0.2%     
- Complexity     2067     2071      +4     
===========================================
  Files           454      454             
  Lines         10618    10651     +33     
  Branches        631      631             
===========================================
+ Hits           6791     6834     +43     
+ Misses         3502     3494      -8     
+ Partials        325      323      -2

Impacted Files	Coverage Δ	Complexity Δ
...tson/developer_cloud/http/HttpClientSingleton.java	83.33% <100%> (+0.72%)	9 <0> (+1)	⬆️
...r_cloud/conversation/v1/model/WorkspaceExport.java	66.66% <0%> (-4.77%)	9% <0%> (-1%)
...xt/v1/websocket/SpeechToTextWebSocketListener.java	72.46% <0%> (-4.35%)	13% <0%> (-1%)
.../developer_cloud/text_to_speech/v1/model/Word.java	100% <0%> (ø)	7% <0%> (ø)	⬇️
..._cloud/speech_to_text/v1/model/RegisterStatus.java	100% <0%> (ø)	3% <0%> (ø)	⬇️
...oper_cloud/text_to_speech/v1/model/CustomWord.java	0% <0%> (ø)	0% <0%> (ø)	⬇️
...r_cloud/speech_to_text/v1/model/AudioResource.java	100% <0%> (ø)	5% <0%> (ø)	⬇️
...loud/conversation/v1/model/DialogNodeNextStep.java	0% <0%> (ø)	0% <0%> (ø)	⬇️
.../developer_cloud/conversation/v1/Conversation.java	70.85% <0%> (+0.36%)	104% <0%> (+1%)	⬆️
... and 28 more

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