[#82827582] Update ChangeLog to start feature "Improve test coverage to an appropriate level"

https://www.pivotaltracker.com/story/show/82827582
[#82827582] Added pull request url to ChangeLog

https://github.com/zvelo/envetcd/pull/4
Added test application and flagSetter
Added tests for newEtcdConfig and getClient
Added test for getKeyPairs
Added tests for getEnpoints and getTransport
added runner test
modified testing etcd keypair values
Merge branch 'feature/82827582_karldominguez_improve_test_coverage_to_an_appropriate_level' into feature/82827566_karldominguez_write_unit_tests_for_testing_variable_overriding

Conflicts:
	ChangeLog