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SONARJAVA-1873 Find method when using method references as initialize…

…r of variable (SonarSource#1029)

* SONARJAVA-1873 Find method when using method references as initializer of variable

* Refactor in order to keep responsability separated between resolve and typeAndRefSolver

* Complete unit test to validate correct references

Fix quality flaw: remove useless TODO comments

Fix quality flaw: fix number of nested if

Release 4.2

Improve coverage

release 4.1

SONARJAVA-1790 Update RSPECs

SONARJAVA-1757 Ignore serializable classes (SonarSource#942)

release 4.0