5.0 version
  Add some extra state to try to prevent sending committedread to node too early


ndb/src/kernel/blocks/dbdih/Dbdih.hpp:
  remove extra virtual-indirection
ndb/src/kernel/blocks/dbdih/DbdihInit.cpp:
  remove extra virtual-indirection
ndb/src/kernel/blocks/dbdih/DbdihMain.cpp:
  remove extra virtual-indirection
ndb/src/kernel/blocks/dblqh/Dblqh.hpp:
  Add retry mechanism to send TCKEYREF
    (as extra safety)
ndb/src/kernel/blocks/dblqh/DblqhMain.cpp:
  Add retry mechanism to send TCKEYREF
    (as extra safety)
ndb/src/kernel/blocks/dbtc/Dbtc.hpp:
  Add extra state to prevent sending committed reads to node to early
    (before connection establishment)
ndb/src/kernel/blocks/dbtc/DbtcInit.cpp:
  Add extra state to prevent sending committed reads to node to early
    (before connection establishment)
ndb/src/kernel/blocks/dbtc/DbtcMain.cpp:
  Add extra state to prevent sending committed reads to node to early
    (before connection establishment)
ndb/src/kernel/vm/SimulatedBlock.cpp:
  remove extra virtual-indirection
ndb/src/kernel/vm/SimulatedBlock.hpp:
  remove extra virtual-indirection