[TEST_BUG] JPKG001-002 instruction need to be updated.

Test bundle: JDK15b24
Test platform:win10 x64
Test instructions:
JPKG001-002: FileAssociationsTest
    1.Check preconditions
        a.VERIFY There are no JREs/JDKs installed.
        b.Delete any old appOutput.txt left on machine
    2.Create empty test file with file extension ".jptest1" on Desktop
        a.Example, from command prompt enter command: echo > foo.jptest1
    3.Create empty test file with file extension ".jptest2" on Desktop
    4.Create empty test file with file extension ".jptest3" on Desktop
    5.Launch <artifact_name> and finish install
    6.Open file explorer and navigate to Desktop, press F5 so file explorer is refreshed
        a.VERIFY file with extension .jptest1 has new icon:
        b.VERIFY file with extension ".jptest2" has new icon:
    7.Right click on file with extension ".jptest3" and click on Properties from menu
    a.VERIFY file is NOT associated with jpackage application
 
Expected Result:
File with extension .jptest1 and file with extension .jptest2 have new icon.

Actual Result:
There is no new icon for these files.

The steps need to be updated as follows:
    1.Check preconditions
        a.VERIFY There are no JREs/JDKs installed.
        b.Delete any old appOutput.txt left on machine
    2.Launch <artifact_name> and finish install
    3.Create empty test file with file extension ".jptest1" on Desktop
        a.Example, from command prompt enter command: echo > foo.jptest1
        b.VERIFY file with extension .jptest1 has new icon
    4.Create empty test file with file extension ".jptest2" on Desktop
        a.VERIFY file with extension ".jptest2" has new icon
    5.Create empty test file with file extension ".jptest3" on Desktop
    6.Right click on file with extension ".jptest3" and click on Properties from menu
    a.VERIFY file is NOT associated with jpackage application