MSSQL

...G...... [ZBXNEXT-9281] added configurable item timeout support

Merge in AP/mssql from feature/DEV-3915-7.0 to release/7.0

* commit '7e09c28382c651c1d113fb6655835bc49a448b4f':
  .......... [DEV-3915] applied suggestion (doc)
  .......... [DEV-3915] applied suggestion (doc)
  .......... [DEV-3915] added readme and conf file changes
  .......... [DEV-3915] added changelog
  ...G...... [DEV-3915] fixed minor lint issues, added minor test improvements
  ...G...... [DEV-3915] fixed tests, refactored
  ...G...... [DEV-3915] added per-item timeout support

(cherry picked from commit 2b59a29c928c46b4d3a52e98f7954f3d97562414)