RFR(T?): 8241006: Cleanup TemplateInterpreter initialization

[Claes Redestad]

Hi,

some initialization is unnecessarily called twice. Also clean up some
unused things in the neighborhood, and a TraceTime around what is
effectively compiled down to ~1200 instructions.

bug:    https://bugs.openjdk.java.net/browse/JDK-8241006
webrev: http://cr.openjdk.java.net/~redestad/8241006/open.00/index.html

Testing: tier1-2

Thanks!

/Claes