8129962: Investigate performance improvements in langtools combo tests
Summary: New combo API that runs all combo instances in a shared javac context (whenever possible).
Reviewed-by: jjg, jlahoda, vromero

8076543: Add @modules as needed to the langtools tests
Reviewed-by: jjg, shurailine

8005207: test has 2 @bug tags
Reviewed-by: mcimadamore

8006694: temporarily workaround combo tests are causing time out in several platforms
Reviewed-by: jjg
Contributed-by: maurizio.cimadamore@oracle.com

8005167: execution time of combo tests in javac should be improved
Reviewed-by: jjg, jjh

8003280: Add lambda tests
Summary: Turn on lambda expression, method reference and default method support
Reviewed-by: jjg

7177386: Add attribution support for method references
Summary: Add type-checking/lookup routines for method references
Reviewed-by: jjg, dlsmith

7120463: Fix method reference parser support in order to avoid ambiguities
Summary: Add lookahead routine to disambiguate between method reference in method context and binary expression
Reviewed-by: jjg, dlsmith

7120266: javac fails to compile hotspot code
Summary: Parser changes for method references cause bad intercation with method call syntax
Reviewed-by: jjg

7115052: Add parser support for method references
Summary: Add support for parsing method references to JavacParser
Reviewed-by: jjg