Test java/awt/FontClass/NegativeAngleTest/NegativeAngleTest.java is unstable

This test fails on linux on mach5, maybe the bug is similar to JDK-7017633
----------System.out:(23/2557)----------
Font java.awt.Font[family=David CLM,name=David CLM Bold,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=David CLM,name=David CLM Bold Italic,style=plain,size=1] has negative italic angle.
Font java.awt.Font[family=David CLM,name=David CLM Bold Italic,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=David CLM,name=David CLM Medium,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=David CLM,name=David CLM Medium Italic,style=plain,size=1] has negative italic angle.
Font java.awt.Font[family=David CLM,name=David CLM Medium Italic,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Hadasim CLM,name=Hadasim CLM Bold,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Hadasim CLM,name=Hadasim CLM BoldOblique,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Hadasim CLM,name=Hadasim CLM Regular,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Hadasim CLM,name=Hadasim CLM RegularOblique,style=plain,size=1] has negative italic angle.
Font java.awt.Font[family=Hadasim CLM,name=Hadasim CLM RegularOblique,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Keter YG,name=Keter YG Bold,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Keter YG,name=Keter YG Bold Oblique,style=plain,size=1] has negative italic angle.
Font java.awt.Font[family=Keter YG,name=Keter YG Bold Oblique,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Keter YG,name=Keter YG Medium,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Keter YG,name=Keter YG Medium Oblique,style=plain,size=1] has negative italic angle.
Font java.awt.Font[family=Keter YG,name=Keter YG Medium Oblique,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Simple CLM,name=Simple CLM Bold,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Simple CLM,name=Simple CLM BoldOblique,style=plain,size=1] has negative italic angle.
Font java.awt.Font[family=Simple CLM,name=Simple CLM BoldOblique,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Simple CLM,name=Simple CLM Medium,style=italic,size=24] has negative italic angle.
Font java.awt.Font[family=Simple CLM,name=Simple CLM MediumOblique,style=plain,size=1] has negative italic angle.
Font java.awt.Font[family=Simple CLM,name=Simple CLM MediumOblique,style=italic,size=24] has negative italic angle.
----------System.err:(12/720)----------
java.lang.Error: There are 23 fonts with negative italic angles.
at NegativeAngleTest.main(NegativeAngleTest.java:45)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:229)
at java.base/java.lang.Thread.run(Thread.java:841)