Summary: Added a new test_env.txt file to capture common shell variable. Added concept of COMPILEJAVA for use when TESTJAVA is a JRE. If COMPILEJAVA not set then TESTJAVA will be the default with assumption it is a JDK.
Reviewed-by: kvn, brutisso, coleenp

Summary: Add case for CYGWIN in .sh files.
Reviewed-by: coleenp, kvn
Contributed-by: pavel.punegov@oracle.com

Summary: Add Darwin like Linux to shell scripts
Reviewed-by: kvn, kamg, dholmes

Reviewed-by: kvn

Reviewed-by: coleenp, minqi