[7u14] Request for approval for CR 7077259 - [TEST_BUG] [macosx] Test work correctly only when default L&F is Metal.

[Konstantin Shefov]

Hello,

Please review a fix for the issue:

7077259 - [TEST_BUG] [macosx] Test work correctly only when default L&F 
is Metal.

The webrev is http://cr.openjdk.java.net/~kshefov/8006998/webrev.00

Direct backport from jdk 8 is suggested.

Thanks,
Konstantin