allow ndb_mgmd to use my.cnf for cluster configuration


ndb/src/mgmsrv/ConfigInfo.cpp:
  Depricate Id infavor of nodeid in config.ini
ndb/src/mgmsrv/InitConfigFileParser.cpp:
  Add support for getting cluster config from my.cnf [cluster_config]
ndb/src/mgmsrv/InitConfigFileParser.hpp:
  Add support for getting cluster config from my.cnf [cluster_config]
ndb/src/mgmsrv/MgmtSrvr.cpp:
  Add support for getting cluster config from my.cnf [cluster_config]
ndb/src/mgmsrv/MgmtSrvrConfig.cpp:
  Add support for getting cluster config from my.cnf [cluster_config]
ndb/src/mgmsrv/main.cpp:
  Add support for getting cluster config from my.cnf [cluster_config]