#2047 BubbleChartRenderer colors from dataset issue (3.0.1)

[chbachmann]

Fix for issue #2047 BubbleChartRenderer colors from dataset issue (3.0.1)

[liuxuan30]

@petester42 I notice Travis is failing for new errors:

▸ Running script 'Copy Carthage Frameworks'

▸ Touching ChartsTests.xctest

▸ Signing /Users/travis/Library/Developer/Xcode/DerivedData/Charts-dsitxzqjkujfnvaoreewgudaitlo/Build/Intermediates/CodeCoverage/Products/Debug-iphonesimulator/ChartsTests.xctest

2017-01-10 07:04:53.221 xcodebuild[8074:27347] Error Domain=IDETestOperationsObserverErrorDomain Code=5 "Early unexpected exit, operation never finished bootstrapping - no restart will be attempted" UserInfo={NSLocalizedDescription=Early unexpected exit, operation never finished bootstrapping - no restart will be attempted}

Testing failed:

	Test target ChartsTests encountered an error (Early unexpected exit, operation never finished bootstrapping - no restart will be attempted)

** TEST FAILED **

any ideas? New rake issue or?

[jjatie]

#3202