Allow JVM system properties to be referenced in the agent name

In some systems like OC4J it's hard to define the separate agent names for the processes that system launches in a cluster. We already have two users with exactly same problem and solution so far was to use random generator in the name of the agent or use same name for all processes. Both of these have big problems, thus idea came to support usage of JVM system properties in the agent name:

inspectIT should recognize if in the name we have the parameter pattern and try to read it from the JVM system properties and combine it in a final name.