Fix ndb_limit, handle cmpDate of length 3
Remove ucs2 test as it requires one to configure --with-extra-charsets


mysql-test/r/ndb_charset.result:
  Remove ucs2 test as it requires one to configure --with-extra-charsets
mysql-test/t/ndb_charset.test:
  Remove ucs2 test as it requires one to configure --with-extra-charsets
ndb/src/common/util/NdbSqlUtil.cpp:
  Fix ndb_limit, handle cmpDate of length 3