Some updates for getting ready for Java 11

[codecov-io]

Codecov Report

Merging #68 into master will decrease coverage by 43.78%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             master   #68       +/-   ##
==========================================
- Coverage     43.78%    0%   -43.79%     
==========================================
  Files             3     3               
  Lines           201   201               
  Branches         18    18               
==========================================
- Hits             88     0       -88     
- Misses          104   201       +97     
+ Partials          9     0        -9

Impacted Files	Coverage Δ	Complexity Δ
...a/com/saucelabs/junit/ConcurrentParameterized.java	0% <0%> (-55.2%)	0% <0%> (-10%)
.../com/saucelabs/junit/SauceOnDemandTestWatcher.java	0% <0%> (-48.72%)	0% <0%> (-4%)

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[joshgrantsauce]

Not much to update due to recent changes removing some code. Only three notes for getting ready for Java 11 LTS:

• I added JDK 11 support on CI
• We are currently not making use of any Java HTTP client libraries, but as of JDK 11, HttpClient will be default and should be preferred
• JDK 11 will also support "scripting" in Java where a single Java file can be executed similar to a Perl/Python/Ruby script. Here's an example.