This is follow up to JDK-8160271 to address the following:
1.) remove remaining code related to PerfLogger
2.) move all Java getenv calls to call into Environment.java and define all env variables used there.
3.) investigate possibly obsolete env variables and remove if possible.
1.) remove remaining code related to PerfLogger
2.) move all Java getenv calls to call into Environment.java and define all env variables used there.
3.) investigate possibly obsolete env variables and remove if possible.