Set default optimizer, updated cnntrainer to replace unsupported optimizer by...

Set default optimizer, updated cnntrainer to replace unsupported optimizer by default, added JUnit test for unsupported train parameters
2 jobs for update_cnntrainer in 3 minutes and 51 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Windows
passed #269197
Windows10
masterJobWindows

00:02:18

 
  Linux
passed #269198
BranchJobLinux

00:01:33