Add getDynamicMappings example test case

[daedalus28]

Could just be a runkit. An example use case from a real world scenario traversing elastic mappings to extract repeated chunks of mappings.

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Latest commit: 6f0451e59790fe8b7acd97b8d4cec14ef015ff52

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Coverage after merging elastic-example into master will be

83.92%

Coverage Report

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