RFR 8042003: java/lang/Math tests have external dependency on sun.misc.DoubleConsts and sun.misc.FloatConsts

[Amy Lu]

There are jdk tests that have dependency on sun.misc.DoubleConsts and 
sun.misc.FloatConsts.
This fix is to remove above internal API dependency from the tests.

bug: https://bugs.openjdk.java.net/browse/JDK-8042003
webrev: http://cr.openjdk.java.net/~ewang/amylu/JDK-8042003/webrev.00/

The fix:
1. Updated test withconstants that defined in java.lang.Double/Float if 
the definition exist
2. Introduced jdk.testlibrary.DoubleUtils/FloatUtils to contain 
additional constants

Thanks,
Amy