Make sure that data can not e left lingering in receive buffer


ndb/src/common/transporter/Packer.cpp:
  test, make MAX_RECEIVED_SIGNALS an variable
ndb/src/common/transporter/TCP_Transporter.hpp:
  add new method for checking of data in receive buffer
ndb/src/common/transporter/TransporterRegistry.cpp:
  Make sure that 
  1) poll_TCP return true if any transporter has data in receiveBuffer
     (previously only if socket had data)
  2) performReceive executes signals if TCP transporter has data in receiveBuffer
     (previously only if data was recevied)
ndb/src/kernel/blocks/cmvmi/Cmvmi.cpp:
  test, make MAX_RECEIVED_SIGNALS an variable
ndb/test/ndbapi/testNdbApi.cpp:
  testcase
ndb/test/run-test/daily-basic-tests.txt:
  testcase