OS-neutral filesystem path creation

[gerashegalov]

Related issues
N/A

Describe the proposed solution
Avoid using explicit path separators

Describe alternatives you've considered
N/A

Additional context
N/A

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @gerashegalov to sign the Salesforce.com Contributor License Agreement.

[tovbinm]

@gerashegalov please make sure you replaced it everywhere in the code.

[codecov]

Codecov Report

Merging #51 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #51      +/-   ##
==========================================
+ Coverage   84.77%   84.77%   +<.01%     
==========================================
  Files         298      298              
  Lines        9751     9753       +2     
  Branches      340      329      -11     
==========================================
+ Hits         8266     8268       +2     
  Misses       1485     1485

Impacted Files	Coverage Δ
...ain/scala/com/salesforce/op/cli/SchemaSource.scala	87.93% <100%> (ø)	⬆️
...main/scala/com/salesforce/op/test/TestCommon.scala	50% <100%> (+6.25%)	⬆️
...ain/scala/com/salesforce/op/OpWorkflowRunner.scala	86.95% <100%> (ø)	⬆️
...alesforce/op/cli/gen/templates/SimpleProject.scala	100% <100%> (ø)	⬆️
...salesforce/op/test/PassengerSparkFixtureTest.scala	79.16% <100%> (-0.84%)	⬇️

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[gerashegalov]

@tovbinm It was my intent to replace all occurrences. lmk if I missed some. Classpath resources are fine to leave as is.

[tovbinm]

Nice!! We can run it on Windows :)

[gerashegalov]

Better be friends with github owners 😃