Implementation of "get connection parameter" mgmd call for getting from mgmd what port to use for a connection between two nodes.

(The actual use of this function is not yet implemented)


ndb/include/mgmapi/mgmapi_debug.h:
  Add ndb_mgm_get_connection_int_parameter() prototype
ndb/src/mgmapi/mgmapi.cpp:
  Add ndb_mgm_get_connection_int_parameter() implementation
ndb/src/mgmsrv/MgmtSrvr.cpp:
  Add implementation of MgmtSrvr::getConnectionDbParameter()
ndb/src/mgmsrv/MgmtSrvr.hpp:
  Add prototype for get_connectionDbParemeter
ndb/src/mgmsrv/Services.cpp:
  Add "get connection parameter" mgmd command (for over the wire)
  
  add getConnectionParameter handler for it
ndb/src/mgmsrv/Services.hpp:
  Add prototype for getConnectionParameter