Java7 and Java8 improvements#3

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herenyi wants to merge 4 commits intocodehaus:masterfrom

Commits on Feb 1, 2018

Added Java7 default method for interface and java8 lambdas and method references with tests
herenyi
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Commits on Jun 26, 2018

Added a fix and a test previously found in cobertura
herenyi
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Commits on Jul 23, 2018

Fixing try with resource parsing when multiple declarations and ends with a ;
herenyi
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Commits on Mar 5, 2019

Adding lambda cast
herenyi
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