send Temptable.currMemoryInBytes and its copy to the frontend, but not tested
add peakMemoryInBytes in TempTableLimit, and modified one test case
Merge branch 'master' into ENG-6361
remove commented code
init peakMemoryInBytes in TempTableLimits constructor
modify source files to pass eecheck
move clean up code to a function
Merge pull request #1425 from VoltDB/ENG-6361

Eng-6361: pass two extra parameters from engine to frontend