Introduce new variable c_newest_restorable_gci
    which is set _after_ both GCP_SAVE and COPY_GCI
    
  This variable is used when cutting redo (calcKeepGci)
  
  Also make sure complete GCI is run inbetween LCP's


ndb/src/kernel/blocks/dbdih/Dbdih.hpp:
  Introduce new variable c_newest_restorable_gci
    which is set _after_ both GCP_SAVE and COPY_GCI
  
  This variable is used when cutting redo (calcKeepGci)
  Also make sure complete GCI is run inbetween LCP's
ndb/src/kernel/blocks/dbdih/DbdihMain.cpp:
  Introduce new variable c_newest_restorable_gci
    which is set _after_ both GCP_SAVE and COPY_GCI
  
  This variable is used when cutting redo (calcKeepGci)
  Also make sure complete GCI is run inbetween LCP's