ISPN-4055 Upgrade to JGroups 3.5.0.Alpha1

* bundler updated to sender-sends-with-timer
ISPN-4031 Server REST console not showing all options on narrow screens
ISPN-4013 Improve MapReduceTask timeout exception messages
ISPN-4035 SingleFileStore.FileEntry.compareTo is wrong

Changed FileEntry.compareTo(fe) to return 0 if the entries are equal.
ISPN-4054 Scripts to analyze test failures and corresponding issues

* find_unstable_tests.py - list the tests with the @Test(groups =
  "unstable") annotation
* find_unstable_tests_jira.py - list the tests with an open issue in JIRA
* find_unstable_tests_teamcity.py - list the tests with failures in CI
* diff_test_lists.py - find differences in the three sets of tests, e.g.
  tests with failures in CI and with an issue in JIRA but not in the
  unstable group.
CacheMBeanTest.testManagerStopRemovesCacheMBean wasn't stopping its cache manager on failure
ISPN-4041 ForceWriteLockTest.testWriteLockIsAcquired always fails

Change the locking mode to PESSIMISTIC and use the transaction instead
of the invocation context to check the locking status.
Move more random failing tests to the unstable group

* ISPN-3631 - o.i.persistence.support.AsyncStoreEvictionTest
* ISPN-3994 - o.i.rest.IntegrationTest
* ISPN-4023 - o.i.server.test.rest.RESTCertSecurityTest
* ISPN-4026 - o.i.server.test.configs.ExampleConfigsTest
* ISPN-4017 - o.i.client.hotrod.BaseBulkGetKeysTest
* ISPN-4057 - o.i.server.test.clusteredcache.ClusteredCacheConfigurationTest
* ISPN-4058 - o.i.test.integration.as.cdi.GreetingServiceIT
* ISPN-4029 - o.i.commons.util.concurrent.NotifyingFutureTest
Update JIRA references in unstable tests

Also add alwaysRun = true @Before and @After methods where required
* For @Before, it's needed for test methods in other groups (e.g. unstable)
* For @After, it's needed otherwise the method won't run if the test failed
ISPN-4024 Cross-Site State transfer: alpha version

Cross-Site Replication State Transfer in a stable topology,
i.e. no nodes leaving or joining during the state transfer.