Description of problem:
WildFlySecurityManager throws ExceptionInInitializerError exception by some tests with security manager.

Affected tests found so far:

• org.jboss.as.test.integration.batch.deployment.JobControlTestCase#testStop
• org.jboss.as.test.integration.ejb.mdb.ejb2x.MDB20MessageSelectorTestCase#retestMessageSelectors
• org.jboss.as.test.integration.ejb.mdb.ejb2x.MDB20QueueTestCase#testEjb20MDB
• org.jboss.as.test.integration.ejb.mdb.ejb2x.MDB20TopicTestCase#testEjb20TopicMDBs
• org.jboss.as.test.integration.ejb.mdb.ejb2x.MDB21TestCase#testSimple21MDB
• org.jboss.as.test.integration.ejb.pool.lifecycle.PooledEJBLifecycleTestCase#testMDB
• org.jboss.as.test.xts.annotation.compensationScoped.CompensationScopedTestCase#shouldSeeDifferentValuesInDifferentTransactions
• org.jboss.as.test.xts.wsat.client.ATTestCase#testWSATVoteReadOnly
• org.jboss.as.test.xts.wsba.coordinatorcompletion.client.BACoordinatorCompletionTestCase#testWSBACoordinatorSimple

Steps to Reproduce for MDB20QueueTestCase:

1. ./integration-tests.sh -fae -Dmaven.test.failure.ignore=true -Dnode0=$MYTESTIP_1 -Dnode1=$MYTESTIP_2 -DfailIfNoTests=false -Dsecurity.manager -Dts.basic -Dts.noSmoke -Dtest=MDB20QueueTestCase

Actual results:

testEjb20MDB(org.jboss.as.test.integration.ejb.mdb.ejb2x.MDB20QueueTestCase)  Time elapsed: 0.094 sec  <<< ERROR!
java.lang.ExceptionInInitializerError: null
	at org.wildfly.security.manager.WildFlySecurityManager.checkPermission(WildFlySecurityManager.java:273)
	at org.wildfly.security.manager.WildFlySecurityManager.checkPropertyAccess(WildFlySecurityManager.java:496)
	at java.lang.System.getProperty(System.java:717)
	at java.lang.Integer.getInteger(Integer.java:1101)
	at java.lang.Integer.getInteger(Integer.java:1057)
	at org.jboss.as.test.shared.TimeoutUtil.<clinit>(TimeoutUtil.java:39)
	at org.jboss.as.test.integration.ejb.mdb.ejb2x.MDB20QueueTestCase.testEjb20MDB(MDB20QueueTestCase.java:110)