added specialized profiler to proxy service
times all proxy operations
logs on the standard log, enable with:
com.ibm.sbt.service.basic.ProxyProfiler.level = FINEST
don't forget to tune the hanlder as well, i.e.:
java.util.logging.ConsoleHandler.level = FINEST
Merge pull request #1131 from LorenzoBoccaccia/master

added specialized profiler to proxy service