minor update to ndb-autotest.sh and config files


ndb/test/run-test/conf-daily-devel-ndbmaster.txt:
  Add SendBufferMemory to remove rare overruns
ndb/test/run-test/conf-dl145a.txt:
  Add SendBufferMemory to remove rare overruns
ndb/test/run-test/conf-ndbmaster.txt:
  Add SendBufferMemory to remove rare overruns
ndb/test/run-test/conf-shark.txt:
  Add SendBufferMemory to remove rare overruns
ndb/test/run-test/ndb-autotest.sh:
  Add support for conf per host