RFR: JDK-8282777: Create a Regression test for JDK-4515031

[Srinivas Mandalika]

Create a Regression test for [JDK-4515031](https://bugs.openjdk.java.net/browse/JDK-4515031)

The issue indicates the need for a a getAccessibleDescription being implemented for the JFileChooser.
The test added verifies the same.

-------------

Commit messages:
 - 8282777:Create a Regression test for JDK-4515031

Changes: https://git.openjdk.java.net/jdk/pull/7738/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7738&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282777
  Stats: 98 lines in 1 file changed: 98 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7738.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7738/head:pull/7738

PR: https://git.openjdk.java.net/jdk/pull/7738