RFR(S) JDK-8218004: Clean up terminology for shared methods within the JVM for indy and condy support

[Lois Foltan]

Please review this change to remove "invoke_dynamic" from the name of 
several ConstantPool bootstrap helper methods that are shared by both 
indy and condy.

open webrev at: 
http://cr.openjdk.java.net/~lfoltan/bug_jdk8218004.1/webrev/
bug link: https://bugs.openjdk.java.net/browse/JDK-8218004
co-contributors: Lois Foltan & John Rose

Testing: hs-tier1-4 & jdk-tier1-3 (all platforms - in progress), 
hs-tier5-6 (linux only - in progress), JCK vm & lang (linux only - 
completed)

Thanks,
Lois