RFR: 8002307 javax.management.modelmbean.ModelMBeanInfoSupport may expose internal representation by storing an externally mutable object

[Jaroslav Bachorik]

Please, review the fix for JDK-8002307.

The fix assures the immutability by cloning the provided arrays in the
constructor and then cloning them again in the getters.

The constructors are fixed in the javax/management/MBeanInfo.java and
the arrays used in getters are cloned using an already existing
functionality in the same class.

http://cr.openjdk.java.net/~jbachorik/8002307/webrev.01

Thanks,

-JB-