Online instrumentation mode

[andre15silva]

I'm working on this PR, which features a new mode for getting the covered test results through online instrumentation, instead of through offline instrumentation as it is the case of all modes right now.

The advantages are:

• No inconsistencies between classloaders. (see Classpath issues ASSERT-KTH/flacoco#85). This means that we just need to set the classpath with all binaries (dependencies, tests, source) in it and that's it.
• Support for cases where no access to the specific binary directories is available (see https://github.com/SpoonLabs/flacoco), only the classpath and test cases.
• With the options includes and excludes, we can optimize the analysis/instrumentation without any PR to jacoco. Related to Optimize coverage analysis  #111
• We can finally cover tests if we want to (see Option for intrumenting and computing the coverage of test classes #96), it is just a matter of setting the test classes to be included.

The PR's main work is finished. Tomorrow I'll finish adding tests and testing the remaining integration with flacoco and other tools.

Early feedback is appreciated though, specifically if you want to merge some test-runner modes.

[andre15silva]

coveralls is failing because it doesn't find the source files of the jacoco agent.

The coveralls-maven-plugin does not have the option to ignore these errors (trautonen/coveralls-maven-plugin#113).

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@ee045f4). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #117   +/-   ##
=========================================
  Coverage          ?   41.08%           
  Complexity        ?      321           
=========================================
  Files             ?       68           
  Lines             ?     2529           
  Branches          ?      189           
=========================================
  Hits              ?     1039           
  Misses            ?     1425           
  Partials          ?       65           

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[andre15silva]

@danglotb I have cherry-picked the commits that replace the coverage platform to #118.

After that is merged, I'll rebase here and this will be ready too.

[andre15silva]

Thank you @danglotb !

This one is ready now too.

[andre15silva]

@danglotb do you have any timeline of when you will be able to review this PR?

This PR is blocking ASSERT-KTH/flacoco#86, SpoonLabs/astor#323 and SpoonLabs/nopol#220 and I'd like to finish it them by the end of this week (when I finish my internship) 😅

[andre15silva]

Thanks!