RFR: JDK-8213480: update internal ASM version to 7.0

[Vicente Romero]

Hi,

Version 7.0 of ASM has been released. This version supports condy, yay!, 
and we want to include it in JDK 12. Please review [1] which includes:
- the new version perse substituting the preview ASM internal version in 
the JDK
- changes to additional files in particular some tests, mostly hotspot 
tests.

Thanks,
Vicente

[1] http://cr.openjdk.java.net/~vromero/8213480/webrev.00/