Improvements
- count and report meta-data calls in config profiling info (the
information is printed on destruction of the Configuration object if
the environment variable; TDAQ_DUMP_CONFIG_PROFILER_INFO is defined, or on
explicit call Configuration::print_profiling_info() from the user's
code)
- when read meta-information, remove unused check of class presence (bug
affecting performance);
- print out detailed debug information about calls of implementation
methods reading data from rdb server (ERS debug level 3), that can be useful
for debug RDB communications between client and server.