Changes

Change bintray download url from HTTP to HTTPS

Change-Id: Ib17394d65bf724ae3437ca54661a35abf76d4d52
(cherry picked from commit ff7568b9ccdeba5db7ff04f93e9453a2460f80dc)
Reviewed-on: https://git.eclipse.org/r/158334
Tested-by: CI Bot
Reviewed-by: Andi Bur <andi.bur@gmail.com>

Fix potential race condition in UiSessionInitAndDisposeTest

Add missing waitForCondition to make sure the protocol entries are
written in deterministic order.

Change-Id: Ieb14a4e3398ee513a337cbd2c01110d66443225a

Mark slow and resource intensive tests with a JUnit test category

Mark JobManagerLoadTest as a resource intensive test as it requires up
to 25k native threads.
Mark tests which require more than five seconds to be executed as slow
tests.

Change-Id: I45773bd89763b98d195753b915768d57a217533e
Reviewed-on: https://git.eclipse.org/r/161036
Tested-by: CI Bot
Reviewed-by: Beat Schwarzentrub <bsh@bsiag.com>

Add maven property scout.excludeTestCategories

Maven property scout.excludeTestCategories allows to set excluded JUnit
test categories.
This additional property is required as not all tests depend on
platform.test module and therefore test category class may not be
available. If a test category class is not available maven surefire
cannot load JUnit test category classes and will fail. In later surefire
releases this would generate only a warning.

In a future scout release these test categories will be replaced by
JUnit 5 tags and then the build may be simplified.

Change-Id: I1a9d245a30b86b2845296f080d8ca65882fd16d9

Fix ProcessingExceptionTest

JUnit might run a test method in chain. In such a call chain the
stacktrace has duplicated elements.

Change-Id: Ibaf10baaa6610ec42a8a83b0371907ce7e6dac5c