Feat: added SDKkey and environment in datafile

[mnoman09]

Summary

• Sdk key and environment keys are going to be parse in sdk and will be sent back in optimizelyConfig

Test plan

All unit tests and FSC tests should pass

[coveralls]

Pull Request Test Coverage Report for Build 1715

• 33 of 33 (100.0%) changed or added relevant lines in 7 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.02%) to 90.399%

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Files with Coverage Reduction	New Missed Lines	%
core-api/src/main/java/com/optimizely/ab/config/parser/JsonConfigParser.java	2	97.57%

Totals
Change from base Build 1699:	0.02%
Covered Lines:	4510
Relevant Lines:	4989

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💛 - Coveralls