Fix SimpleStartLevelTestCase

This test fails frequently. The latest failure has this:

$more testsuite/integration/target/surefire-reports/org.jboss.as.test.smoke.embedded.osgi.SimpleStartLevelTestCase.txt -------------------------------------------------------------------------------
Test set: org.jboss.as.test.smoke.embedded.osgi.SimpleStartLevelTestCase
-------------------------------------------------------------------------------
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.5 sec <<< FAILURE!
testStartLevel(org.jboss.as.test.smoke.embedded.osgi.SimpleStartLevelTestCase) Time elapsed: 0.093 sec <<< FAILURE!
java.lang.AssertionError: Bundle cannot be started due to the Framework's current start level
at org.junit.Assert.fail(Assert.java:93)
at org.jboss.as.test.smoke.embedded.osgi.SimpleStartLevelTestCase.testStartLevel(SimpleStartLevelTestCase.java:98)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.jboss.arquillian.junit.Arquillian$6$1.invoke(Arquillian.java:246)
at org.jboss.arquillian.container.test.impl.execution.LocalTestExecuter.execute(LocalTestExecuter.java:60)
at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:90)
at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99)
at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81)
at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:134)
at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:114)
at org.jboss.arquillian.core.impl.EventImpl.fire(EventImpl.java:67)
at org.jboss.arquillian.container.test.impl.execution.ContainerTestExecuter.execute(ContainerTestExecuter.java:38)