RFR: JDK-8328012 : Convert java/awt/im/8148984/bug8148984.java applet test to main [v2]

[Harshitha Onkar]

> The following InputMethod test, bug8148984.java is converted to main using PassFailJFrame.
> 
> - test instructions updated to make to more clear
> - test renamed to PinyinIMCommaTest
> - moved one directory above - /java/awt/im/
> - html file deleted.

Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:

  removed unused Util from jtreg header

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18251/files
  - new: https://git.openjdk.org/jdk/pull/18251/files/4db1ad72..2253bf68

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18251&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18251&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18251.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18251/head:pull/18251

PR: https://git.openjdk.org/jdk/pull/18251