Reviewed-by: sla, ctornqvi, lfoltan, mchung, alanb
Contributed-by: alexander.kulyakhtin@oracle.com

Summary: Change scaling code to allow scaling with 0.0; change set_tiered_flags() to treat CompileThresholdScaling==0.0 in a special way.
Reviewed-by: kvn, iveresov

Summary: Change the way VM handles CompileThresholdScaling==0, update test
Reviewed-by: kvn, drchase, fzhinkin

Summary: Changed interpreter and compilation policies to allow using CompileThresholdScaling on a per-method level
Reviewed-by: jrose, kvn

Reviewed-by: kvn, iignatyev

8059604: Add CompileThresholdScaling flag to control when methods are first compiled (with and withour TieredCompilation)
Summary: This patch adds a new flag (CompileThresholdScaling) to control when methods are first compiled
Reviewed-by: anoll, iveresov, kvn