Make DataRobot provider more flexible to allow various types of binary boolean values

[nmldiegues]

DataRobot is assuming "True", "False" whenever the target variable is boolean, regardless of is actual values.

This makes the provider flexible with respect to that.

[TravisBuddy]

Hey @nmldiegues,
Your changes look good to me!

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TravisBuddy Request Identifier: e16f9ac0-e8c1-11e8-a21b-edb6b5ef4ae4

[TravisBuddy]

Hey @nmldiegues,
Your changes look good to me!

View build log

TravisBuddy Request Identifier: df3cd810-e8c8-11e8-a21b-edb6b5ef4ae4

[codecov[bot]]

Codecov Report

Merging #2 into master will increase coverage by 0.73%. The diff coverage is 100%.

@@             Coverage Diff              @@
##             master       #2      +/-   ##
============================================
+ Coverage     74.69%   75.43%   +0.73%     
- Complexity      216      220       +4     
============================================
  Files            22       22              
  Lines           739      753      +14     
  Branches         68       70       +2     
============================================
+ Hits            552      568      +16     
+ Misses          148      147       -1     
+ Partials         39       38       -1

Impacted Files	Coverage Δ	Complexity Δ
...eedzai/openml/datarobot/DataRobotModelCreator.java	91.3% <100%> (+1.56%)	20 <1> (+3)	:arrow_up:
.../datarobot/ClassificationBinaryDataRobotModel.java	69.44% <0%> (+2.77%)	15% <0%> (+1%)	:arrow_up:

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[TravisBuddy]

Hey @nmldiegues,
Your changes look good to me!

View build log

TravisBuddy Request Identifier: 94613fc0-e8eb-11e8-a21b-edb6b5ef4ae4

[nmldiegues]

@paulojrp can you re-review?