Temporarily comment out OpenJ9 Java 15 images

to avoid an OpenJ9 bug

library/gradle

@@ -48,10 +48,12 @@ Tags: 6.7.0-jre11-openj9, 6.7-jre11-openj9, jre11-openj9
 Architectures: amd64, ppc64le, s390x
 Directory: openj9/jre11
 
-Tags: 6.7.0-jdk15-openj9, 6.7-jdk15-openj9, jdk15-openj9
-Architectures: amd64, ppc64le, s390x
-Directory: openj9/jdk15
-
-Tags: 6.7.0-jre15-openj9, 6.7-jre15-openj9, jre15-openj9
-Architectures: amd64, ppc64le, s390x
-Directory: openj9/jre15
+# temporarily commented out, due to OpenJ9 bug
+#Tags: 6.7.0-jdk15-openj9, 6.7-jdk15-openj9, jdk15-openj9
+#Architectures: amd64, ppc64le, s390x
+#Directory: openj9/jdk15
+
+# temporarily commented out, due to OpenJ9 bug
+#Tags: 6.7.0-jre15-openj9, 6.7-jre15-openj9, jre15-openj9
+#Architectures: amd64, ppc64le, s390x
+#Directory: openj9/jre15