1. Deploy the key files to separate folder to avoid overwriting.
2. Enable hostkeys and kex unit tests.
3. Generate debug info in pdb
4. minor update on snmprintf
1. Reduce the console output of build
2. move to use powershell core 6.0.0.14
3. one minor fix in pester tests.
* Update the path of unittest results and build log. suppress the warning message.
* limitoutput of choco installation.
* fix of quotes
* remove redundant log
* Set x64 Release build as default