4.x: PreparedStatementCachingIT.should_invalidate_cache_entry_on_tuple_udt_change_variable_defs can fail

[dkropachev]

Error:  Tests run: 8, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 147.811 s <<< FAILURE! - in com.datastax.oss.driver.core.cql.PreparedStatementCachingIT
Error:  com.datastax.oss.driver.core.cql.PreparedStatementCachingIT.should_invalidate_cache_entry_on_tuple_udt_change_variable_defs  Time elapsed: 26.781 s  <<< FAILURE!
org.junit.ComparisonFailure: preparedStmtCacheRemoveLatch did not trigger before timeout expected:<[tru]e> but was:<[fals]e>
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at com.datastax.oss.driver.core.cql.PreparedStatementCachingIT.invalidationTestInner(PreparedStatementCachingIT.java:274)
	at com.datastax.oss.driver.core.cql.PreparedStatementCachingIT.invalidationVariableDefsTest(PreparedStatementCachingIT.java:207)
	at com.datastax.oss.driver.core.cql.PreparedStatementCachingIT.lambda$should_invalidate_cache_entry_on_tuple_udt_change_variable_defs$12(PreparedStatementCachingIT.java:370)
	at com.datastax.oss.driver.api.testinfra.ccm.SchemaChangeSynchronizer.withLock(SchemaChangeSynchronizer.java:33)
	at com.datastax.oss.driver.core.cql.PreparedStatementCachingIT.should_invalidate_cache_entry_on_tuple_udt_change_variable_defs(PreparedStatementCachingIT.java:368)