Add num_epoch and eval_metric training parameters to the CNNTrainer.ftl...

Add num_epoch and eval_metric training parameters to the CNNTrainer.ftl template and correct target code for corresponding test
4 jobs for master
Status Job ID Name Coverage
  Windows
failed #168886
Windows10
masterJobWindows

canceled #168858
Windows10
masterJobWindows

 
  Linux
skipped #168887
masterJobLinux
canceled #168859
masterJobLinux

 
Name Stage Failure
failed
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