Fix test failures

http://jenkins.saltstack.com/job/salt-rs-rhel5/1511/
Merge pull request #10108 from terminalmage/tests

Fix test failures
Fix TypeError stacktrace with cmd.run.
Remove log message
fix npm installed command
Merge pull request #10111 from cro/fix_only_10110

Fix only 10110
Merge pull request #10112 from izhukov/fix-npm-install-yo

fix npm installed command
Update dev_requirements in HACKING.rst-- filenames are changed now :)
Merge pull request #10114 from jacksontj/develop

Update dev_requirements in HACKING.rst-- filenames are changed now :)
Revert "Updated network io counter function."

This reverts commit e4d3d38ed5195cd0dc89b7d60464adbbbad67e07.

 - psutil.network_io_counters() isn't deprecated until psutil v1.0.0
Merge pull request #10118 from tedski/9301

Revert "Updated network io counter function."