Update TeamCity CI to use IntelliJ 2019.3

[leventov]

The problem that blocks updating our inspections pipeline from IntelliJ 2017.2.4 (https://youtrack.jetbrains.com/issue/IDEA-215273) is marked as solved in IntelliJ 2019.3. IntelliJ 2019.3 is expected to be released in late 2019. Eventually, this version should become available in TeamCity configuration (if you a Druid committer but cannot open this page, please acquire administrator rights):

[leventov]

For context, previous attempts to update IntelliJ version in TeamCity: #7589, #7541, #7499.

[leventov]

This has happened, the new version of IntelliJ is being tested: https://teamcity.jetbrains.com/viewLog.html?buildId=2665645&buildTypeId=OpenSourceProjects_Druid_Inspections

[leventov]

The build currently fails: https://teamcity.jetbrains.com/viewLog.html?buildId=2665931&tab=Inspection&buildTypeId=OpenSourceProjects_Druid_Inspections, but that's something we can work with.

[leventov]

Labelling this issue as Development Blocker because it blocks #7780.