Add regex bean matching, and regex key search/replace to normalize names

This patch adds two more config items to the JolokiaCollector.conf
mbeansre:  works like mbeans: but matches with regularexpressions
rewrite: which allows rewrite pairs in order to rename collected keys before data is passed to the handler
It is a dictionary, but the initial data is a list of dictionary entries...
a -> b | x -> y
so it needs splitting and loading into a dictionary.