<Swing Dev> RFR: 8233569: [TESTBUG] JTextComponent test bug6361367.java fails on macos

[Prasanta Sadhukhan]

Please review deproblemlisting an issue which is not failing in latest build.  I have made the delay time consistent with other test.
Resultant test is green on all platforms for mach5 test run.
Mach5 job has been run for several iterations in all platforms. Link in JBS.

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Commit messages:
 - Initial fix

Changes: https://git.openjdk.java.net/jdk/pull/977/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=977&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8233569
  Stats: 2 lines in 2 files changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/977.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/977/head:pull/977

PR: https://git.openjdk.java.net/jdk/pull/977