Summary: Add support for function descriptor lookup, functional interface inference and lambda expression type-checking
Reviewed-by: jjg, dlsmith

Reviewed-by: ksrini, mcimadamore

Reviewed-by: jjg

Reviewed-by: jjg, mcimadamore
Contributed-by: vicenterz@yahoo.es

6982992: Tests CheckAttributedTree.java, JavacTreeScannerTest.java, and SourceTreeeScannerTest.java timeout
Summary: Hoist some invariant code out of a loop
Reviewed-by: ksrini

Reviewed-by: mcimadamore

Summary: Added a post-attribution visitor that fixup uninitialized types/symbol in AST after erroneous attribution
Reviewed-by: jjg

Reviewed-by: darcy

Reviewed-by: darcy

Reviewed-by: darcy

Reviewed-by: darcy

Reviewed-by: darcy