added number_of_replicas printout in show table status


mysql-test/r/ndb_alter_table.result:
  added number_of_replicas to show table status printout
mysql-test/r/ndb_autodiscover.result:
  added number_of_replicas to show table status printout
ndb/include/ndbapi/NdbDictionary.hpp:
  added get method for replica count
ndb/include/ndbapi/ndb_cluster_connection.hpp:
  added get method of node id
ndb/src/ndbapi/NdbDictionary.cpp:
  added get method for replica count
ndb/src/ndbapi/ndb_cluster_connection.cpp:
  added get method of node id