The existing network test server has some limitations. Most notably, it
is not accessible by every Qt developer. Also, some services don't allow
simultaneous access, which causes flaky test results.
Instead of centralizing all the services to one physical machine, the
idea is to build up several dedicated servers inside separate Docker
containers.
1. Create testserver.pri and integrate it into the make check command of
Qt Test.
2. Define QT_TEST_SERVER flag for changing test parameters at compile
time.
Task-number: QTQAINFRA-1686
Change-Id: I0422ddb97eb8c11b4818771454851d19671253b1
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@qt.io>
Reviewed-by: Ryan Chu <ryan.chu@qt.io>
