CodeReview fixes for JDK-8005262 possible gamma launcher issues

[Ron Durbin]

JDK-8005262 possible gamma launcher issues

Summary:

There have been several defects and fixes to eliminate
the Gamma Launcher. The attempts to remove the support
for the Gamma Launcher have typically unearthed new issues
outside of the documented issue that is being fixed.
As of this time no new issues have been discovered.

This fix removes all known issues relating to the
removal of the now obsolete Gamma Launcher. This fix
removes all remaining references to Gamma Launcher in
comments and Makefiles.

Testing:

Testing for this fix was limited to a JPRT run.  This
should be adequate as the changes are in comments and Makefiles.

Web URL http://cr.openjdk.java.net/~rdurbin/JDK-8005262_webrevs_cr0/