Disable Log4j1 tests for java versions without '.'
Log4j1 seems to be broken on those.
import datadog.trace.agent.test.log.injection.LogContextInjectionTestBase
import org.apache.log4j.MDC
+import spock.lang.Requires
+/**
+ It looks like log4j1 is broken for any java version that doesn't have '.' in version number
+ - it thinks it runs on ancient version. For example this happens for java13.
+ See {@link org.apache.log4j.helpers.Loader}.
+ */
+@Requires({ System.getProperty("java.version").contains(".") })
class Log4j1MDCTest extends LogContextInjectionTestBase {
@Override
