RFR: 8238735 NPE compiling lambda expression within conditional expression

[Adam Sotona]

Hi,
I would like to ask for review of the patch fixing NPE while compiling lambda expression within conditional expression.
The fix removes obsolete recovery cycle in com.sun.tools.javac.comp.Attr.visitLambda method when Types.FunctionDescriptorLookupError happens and it adds new test.

JBS:  https://bugs.openjdk.java.net/browse/JDK-8238735 
webrev: http://cr.openjdk.java.net/~asotona/8238735/webrev.00/

Mach 5 build with the patch passes all Tier1, Tier2 and Tier3 tests.


Thank you,
Adam