[sinttest] Carry over assertion message when sync point times out
`AbstractSmackIntTest#assertResult()` takes an argument that is an assertion message. When the sync point times out, that message should be logged.
The following illustrates the change, as a result of this assertion failing:
```
assertResult(resultSyncPoint, "Expected " + conTwo.getUser() + " to receive message that was sent by " + conOne.getUser() + " in room " + mucAddress + " (but it did not).");
```
Prior to this change, this is logged:
```
SEVERE: MultiUserChatIntegrationTest.mucTest (Normal) failed: java.util.concurrent.TimeoutException: Timeout expired
java.util.concurrent.TimeoutException: Timeout expired
at org.igniterealtime.smack.inttest.util.ResultSyncPoint.waitForResult(ResultSyncPoint.java:49)
at org.igniterealtime.smack.inttest.AbstractSmackIntTest.assertResult(AbstractSmackIntTest.java:104)
at org.igniterealtime.smack.inttest.AbstractSmackIntTest.assertResult(AbstractSmackIntTest.java:99)
at org.jivesoftware.smackx.muc.MultiUserChatIntegrationTest.mucTest(MultiUserChatIntegrationTest.java:132)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
(snip)
```
With the change in this commit, that becomes:
```
SEVERE: MultiUserChatIntegrationTest.mucTest (Normal) failed: java.util.concurrent.TimeoutException: Expected smack-inttest-two-jskr4@example.org/two-jskr4 to receive message that was sent by smack-inttest-one-jskr4@example.org/one-jskr4 in room smack-inttest-message-jskr4-aud43i@conference.example.org (but it did not).
java.util.concurrent.TimeoutException: Expected smack-inttest-two-jskr4@example.org/two-jskr4 to receive message that was sent by smack-inttest-one-jskr4@example.org/one-jskr4 in room smack-inttest-message-jskr4-aud43i@conference.example.org (but it did not).
at org.igniterealtime.smack.inttest.util.ResultSyncPoint.waitForResult(ResultSyncPoint.java:53)
at org.igniterealtime.smack.inttest.AbstractSmackIntTest.assertResult(AbstractSmackIntTest.java:104)
at org.igniterealtime.smack.inttest.AbstractSmackIntTest.assertResult(AbstractSmackIntTest.java:99)
at org.jivesoftware.smackx.muc.MultiUserChatIntegrationTest.mucTest(MultiUserChatIntegrationTest.java:132)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
(snip)
```
[sinttest] Allow custom processing of test run result
This adds a new configuration option, `testRunResultProcessors`, that allows a user to customize the way the results of a test run is processed.
By default, the pre-exising printing-to-stderr is used.
Guus der Kinderen
Automatically assigned