Conflict with jmockit

An incompatibility with jmockit seems to have been introduced in version 0.5.8 and still exists in 0.6.0 (no problems found with version 0.5.7). Full stacktrace with 0.5.8 below (some class names have been removed). Note: With 0.5.10, the exception is in `org.jacoco.agent.rt_kqcpih.CoverageTransformer.transform(CoverageTransformer.java:91)`

````
java.lang.instrument.IllegalClassFormatException: Error while instrumenting class xxxxxxxx.
	at org.jacoco.agent.rt_1r70et.CoverageTransformer.transform(CoverageTransformer.java:94)
	at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:424)
	at sun.instrument.InstrumentationImpl.redefineClasses0(Native Method)
	at sun.instrument.InstrumentationImpl.redefineClasses(InstrumentationImpl.java:170)
	at mockit.internal.startup.Startup.redefineMethods(Startup.java:124)
	at mockit.internal.RedefinitionEngine.redefineMethods(RedefinitionEngine.java:63)
	at mockit.internal.expectations.mocking.DynamicPartialMocking.redefineTypes(DynamicPartialMocking.java:34)
	at mockit.internal.expectations.RecordAndReplayExecution.applyDynamicPartialMocking(RecordAndReplayExecution.java:203)
	at mockit.internal.expectations.RecordAndReplayExecution.<init>(RecordAndReplayExecution.java:108)
	at mockit.Expectations.<init>(Expectations.java:180)
	at xxxxxxxxxxxxTest$8.<init>(xxxxxxxxxxxTest.java:111)
	at xxxxxxxxx(xxxxxxxxxxTest.java:111)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
	at org.testng.TestRunner.privateRun(TestRunner.java:767)
	at org.testng.TestRunner.run(TestRunner.java:617)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
	at org.testng.SuiteRunner.run(SuiteRunner.java:240)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1198)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1123)
	at org.testng.TestNG.run(TestNG.java:1031)
	at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:77)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.executeMulti(TestNGDirectoryTestSuite.java:159)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.execute(TestNGDirectoryTestSuite.java:99)
	at org.apache.maven.surefire.testng.TestNGProvider.invoke(TestNGProvider.java:106)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
	at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
	at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
````