Review request: JDK-8004928 TEST_BUG: Reduce dependence of CoreLib tests from the AWT subsystem.

[Alexey Utkin]

Bug description:
     https://jbs.oracle.com/bugs/browse/JDK-8004928

Here is the suggested fix:
     http://cr.openjdk.java.net/~uta/openjdk-webrevs/JDK-8004928/webrev.01

Summary:
*test/java/io/Serializable/resolveProxyClass/NonPublicInterface.java*
*test/java/lang/reflect/Proxy/ClassRestrictions.java*
         The set of non-public interfaces was changed to avoid AWT 
dependencies.

*test/java/lang/management/CompilationMXBean/Basic.java*
         The ballast calls
             java.awt.Toolkit.getDefaultToolkit();
             javax.swing.UIManager.getInstalledLookAndFeels();
         were removed from compiled Java code. Compilation time still 
positive.

*test/java/lang/reflect/Generics/Probe.java*
         The dependence from the internal class 
"javax.swing.JComboBox$AccessibleJComboBox"
         was excepted from code. It has very small impact to test coverage.

*test/java/util/Collections/EmptyIterator.java*
         Swing-stored constants were changed to locally-defined.

*test/java/util/logging/LoggingDeadlock4.java*
         Test case was simplified to avoid AWT class loading. Negative 
test result was tested on early
         JDK7 build.

*test/sun/tools/jrunscript/common.sh*
         Useless mention of XToolkit  was removed from the script.

Regards,
-uta