Disable IT for MASSEMBLY-731 on Windows because creating symlinks are by default disabled on Windows

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1743945 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/it/projects/bugs/massembly-731/invoker.properties b/src/it/projects/bugs/massembly-731/invoker.properties
index 2a764a6..34691fd 100644
--- a/src/it/projects/bugs/massembly-731/invoker.properties
+++ b/src/it/projects/bugs/massembly-731/invoker.properties
@@ -1 +1,2 @@
 invoker.java.version = 1.7+
+invoker.os.family = !windows