[9, 8u40] RFR (M): 8063135: Enable full LF sharing by default

[Vladimir Ivanov]

http://cr.openjdk.java.net/~vlivanov/8063135/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8063135

Turn on full LambdaForm sharing and get rid of custom LambdaForm shapes. 
8059877 [1] eliminated most of the regressions caused by LF sharing. The 
rest will be addressed separately [2].

Testing: jck (api/java_lang/invoke), jdk/java/lang/invoke, 
jdk/java/util/streams, octane

Thanks!

Best regards,
Vladimir Ivanov

[1] https://bugs.openjdk.java.net/browse/JDK-8059877
[2] https://bugs.openjdk.java.net/browse/JDK-8063137