Revert "Drop support for VS2015 earlier to Update 3 (#425)" - Postponed (#529)
Revert "Drop support for VS2015 earlier to Update 3 (#425)" - Postponed (#529)

This reverts commit 7ecfc8fd29206a5d2a9f8d523de1aaa0d0d061e3.
SonarSource-VisualStudio/sonarlint-visualstudio