Fixed a problem with sqlserver input where database properties are not returned by Telegraf when SQL Server has been set up with a case sensitive server-level collation.

* Added bugfix entry to CHANGELOG.md for sqlserver collation input fix.

fixes #2603

fixes #2528

closes #2635

fixes #1911

Change was made in gopsutil

* Rename heap_objects_bytes to heap_objects in internal plugin.

This field does not contain bytes

fixes #2671

closes #2469